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n. 克制，控制，管制，操作装置
vt. 控制
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[06:14.86]We should be able to begin the long process of cleaning up our environment.
[06:29.83]However,everything has its dark side as well as its bright side.
[06:44.38]Despite all those benefits.
[06:51.14]environmentalists are worried about it getting out of control,
[06:57.70]which reminds of reading D in 2003 NMET
[07:06.06](for shanghai only.) Can you do it on your own?
[07:32.02]nanotech
[07:40.07]molecular
[07:54.02]microscopic self-replicating machines that put atoms together
[08:14.08]to create copies of anything alive in the world
[08:36.44]In fact,the scientific community is deeply divided over
[08:43.81]whether self-replicating machines are possible.
[09:03.06]If they are,major dangers could exist.
[09:14.71]Mr.Drexler himself thought
[09:24.66]that self-replicating machines could probably go out of control.
[09:38.12]He writes in his book that man-made "plants" with leaves no more efficient
[09:46.19]than today's solar cells could win over real plants
[10:01.94]crowding the earth with leaves that are not suitable to be eaten.
[10:18.19]Tough 'bacteria'
[10:32.14]could be more competitive than the real bacteria:
[10:43.50]They could spread everywhere,
[10:50.06]replicate swiftly,and reduce the earth to dust in a matter of days."
[11:07.61] Cities of nanotech have made use of such images,
[11:13.96]calling for a delay on commercial nanotech until regulations are established
[12:02.83]"In a way,calling for bans on research into molecular manufacturingis
[12:10.88]like calling for a delay on faster-than-light travel because no one is doing it.
[13:22.25]Listening
[13:30.01]1.Listen to the tape.
[13:35.65]What is being described?
[13:39.80]What can the things be used for?
[13:44.35]1.Object described: Chopsticks
[13:56.49]Possible uses:Eating,opening a bottle.You can think of more creative uses
[14:17.52]2.Object described:Cellphone
[14:41.68]Possible uses:Making phone calls,sending pictures,Sending e-mails.
[14:54.35]3.Object described: Refrigerator
[15:19.20]Possible uses:keeping food fresh,keeping drinks cool.Students think of more.
| 重点单词 | 查看全部解释 | |||
| control | [kən'trəul] | |||
| remove | [ri'mu:v] | 联想记忆 | ||
| delay | [di'lei] | |||
| molecule | ['mɔlikju:l] | |||
| foresight | ['fɔ:sait] | |||
| institute | ['institju:t] | 联想记忆 | ||
| competitive | [kəm'petitiv] | 联想记忆 | ||
| appearance | [ə'piərəns] | 联想记忆 | ||
| suitable | ['sju:təbl] | |||
| established | [is'tæbliʃt] |
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