unit 7 bats. t: listen to the passage (or read it silently) and answer this question: in what way...
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Unit 7 BatsUnit 7 Bats Unit 7 BatsUnit 7 Bats
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• T: Listen to the passage (or read it silently) and answer this question:
• In what way does echo-location in bats play a utilitarian role?
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• Do all sounds made by animals serve as language?
• Does the voice play a strictly utilitarian role in the echo-location in bats?
• What must we turn to first to get a full appreciation of what this discovery means?
• What will happen if a person shouts in the vicinity of a wall or a mountainside?
• Who knows this?
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• What if the solid obstruction is further off? • If you tap on the hull of a ship, where will the
sound be reflected from? • How can you calculate the depth of the sea at
that point? • Is an echo-sounding apparatus in general use
in ships? • What will every solid object reflect? • Will a shoal of fish also reflect a sound? • How simple a step is it from locating the sea
bottom to locating a shoal of fish?
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• It is now possible to tell what kind of fish a shoal consists of. How?
• What do certain bats emit?
• How can those bats locate and steer clear of obstacles?
• What can they also locate?
• What is the echo-location of bats often compared with?
• Why is it often compared with radar?
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Bat:
1) Bats fly at night and feed on insects and fruits.
2) As blind as a bat
视力极差的4) Have bats in the belfry
5)精神失常 / 想法怪诞6) Like a bat out of hell
7)极快地 back
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Strictly- clearly and exactly defined precisely limited 明确地Eg. Fishing in this pond is strictly
preserved.utilitarian – made to be useful rather
than decorationadj. 实用的
I bought a set of plain utilitarianKitchen ware for my mother.
n.Utility - quality of being useful
Utilitarian n. 功利主义者 back
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Appreciation – (statement giving )judgement/ valuation.n.欣赏;评价;鉴别
Appreciate v.
Appreciative adj. 感激的; 有欣赏力的
Appreciable adj. 可估计的
back
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obstructionobstruction
-sth that blocks the path of sth
e.g. Your car is causing an obstruction.
你的车挡到了。obstruct. V.
Obstructor/er n.next
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elapseelapse
- Pass away
e.g. Five months have elapsed since he came here
.
next
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HullHull
- the body or frame of a ship most of which goes under the water
e.g. The boat has a beautiful highly faired hull.
这艘船有一个漂亮的流线型的船身。next
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intervalinterval
- a period between two events or times, or the space between two points.
e.g. There was a long interval before he answered the phone.
。 next
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receiptreceipt
- the act or state of receiving money or goods /he fact of receiving
- a written statement that one has received money
e.g. Ask the shop for a receipt for your money when you pay the bill.
。
next
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receiptreceipt
- Be in receipt of 已收到- Make out a receipt 开发票- On receipt of 收到…时e.g. I am in receipt of your mail and
thank you for your greetings.
。 next
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apparatusapparatus
- a set of equipment or tools or sometimes a machine which is used for a particular purpose
- Sets of instruments put together for a purpose
- e.g There some sports apparatuses in the jym.
. next
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shoalshoal
- great number of fish/ people swimming together
- In shoals 成群,许多- A shoal of 一群鱼- Shoals of 许多,大群的(人)- The ship was wrecked on the
shoals..
next
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squeaksqueak
(squeaky adj)- short shrill cry- eg.We heard the squeaks of the
old wooden door.- A narrow /close/near/ tight
squeak- 幸免于难;险遭不测;九死一生
的脱险;非常勉强的成功- Squeak by/ through. 险胜;勉强
通过next
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(squeaky adj)- short shrill cry- eg.We heard the squeaks of the
old wooden door.- A narrow /close/near/ tight
squeak- 幸免于难;险遭不测;九死一生
的脱险;非常勉强的成功- Squeak by/ through. 险胜;勉强
通过next
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•Language points
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1.Not all sounds made by animals
serve as language, and we have
only to turn to that extraordinary
discovery of echo-location in bats
to see a case in which the voice
plays a strictly utilitarian role.
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• Not all : 部分否定• 修饰可数名词复数时, 谓语动词用
复数, 单数及不可数名词用单数。• 例句: Not all food tastes
delicious.
• Not all girls are good at dancing.
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• Serve as 作为, 用作• He has served the company for 50
years, first as office boy and eventually as managing director.
• 他在公司干了 50 年, 最初当勤杂工, 最终当上了管理部门的经理。
• One room had to serve as both bedroom and living room.
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• turn to : 求助于• 例句: They had to turn to the
villagers for advice.
• 他们不得不向村民们求助。
back
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• play a role in ...
• 在 ... 里面扮演角色,发挥作用
• 例句: She played the leading role in the school play.
• 她在学校的戏里扮演主角
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• play a role in ... • 翻译:根据最近一项调查报告,
老师在学生的生活方面也起着重要的作用。
• According to a recent report, teachers also play a very important role in students’ daily life.
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• 2.Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.
• in the vicinity of : 在 ... 附近例句 1. Are there any supermarkets in the vicinity of our community?.
• 2.The family's annual income is in the vicinity of $15000.
• 这家一年的收入在一万五千美元左右。back
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• The further off, the longer time… 越来… . 越 . ..
• 例句 1. the more money you make, the more you spend.
• 2 房间越小, 或者越多人在里面, 房间的空气就越快变坏。
• The smaller the room is, or the more people are in it, the faster the air becomes bad. back
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• 3.Every solid object will reflect a sound, varying according to the size and nature of the object.
back
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• according to :根据,取决于•
例句: Please arrange the books according to size.
• 请按大小将书分类。Every one will be paid according to
his ability.
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• feed on :以 ... 为食物• 例句: Cows feed on hay.• 牛以干草为食。 • Eskimos feed on meat and
fish.• 爱斯基摩人以肉类和鱼类为生
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• 4.So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.
• A group of people• A herd of cattle• A flock of birds• A swarm of bees• A litter of pigs back
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• 5.It has been found that certain bats emit squeaks and by receiving the echoes, they can locate and steer clear of obstacles -- or locate flying insects on which they feed.
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• steer clear of :避开
• 例句: Kids should steer clear of that park, it doesn't seem safe.
• 那个公园好像不安全 , 孩子们应该避开。
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• feed on :以 ... 为食物• 例句: Cows feed on hay.• 牛以干草为食。
back
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-----or locate flying insects on which they feed
• 例句: The teacher from whom I learnt most was Mrs Zhu.
• The hotel which we stayed at was both cheap and comfortable.
• The machine which I have looked after for 20 years, is still working well.
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• 6.This echo-location in bats is often compared with radar, the principle of which is similar. .
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• compare with :与 ... 比较
• 例句: The output of the factory this year has increased by 20 percent as compared with last year.
• 这家厂今年的产量比去年增加了百分之二十。
•
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注意比较: compare to 把 ...比作
• He compared the girl to the moon in the poem.
•他在诗中把那姑娘比作月亮。
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So was born the echo-sounding apparatus, now in general use in ships.
• 本句是一个倒装句,正常语序是:• The echo-sounding apparatus
was so born, now in general use in ships.
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