四级救命词汇 第20课
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- 释义：
- adj. 必不可少的；本质的
- 构词：
- essence[n.基本,本质]+ial有……的→essential根本的,本质的
- 例句：
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The essential thing is that the two of you ought to agree.
根本的问题是你们俩应意见一致. 换一句 -
Elbow pads and knee pads are essential on a skateboard.
滑滑板时带护肘和护膝是必要的. 换一句 -
It is essential for us to know all the facts.
对我们来说,了解所有的事实是必要的. 换一句
您还可以临摹下单词：
essential
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- 释义：
- adj. 有利可图的
- 例句：
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That business became profitable last year.
那项生意去年变得很赚钱. 换一句 -
The practice is not a very lucrative one at the moment, but if it is worked up It'should prove quite profitable.
这种业务眼下还不大能赚钱, 但如果努力经营,会证明是大可获利的. 换一句 -
They found it profitable to exchange and compare ideas.
他们发现交流思想、互相比较有好处. 换一句
您还可以临摹下单词：
profitable
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- 释义：
- adj. 无意义的，无足轻重的；无价值的
- 构词：
- in不,无,非+significant有意义的→adj.无意义的,低微的,微不足道的
- 例句：
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The rate has fallen by an insignificant amount.
比率虽有下降,但微不足道. 换一句 -
Miss Tang said, " Mr. Fang, you are too concerned with insignificant details.
唐小姐道: “ 方先生真会挑眼! 换一句 -
The discontinuities they make in the wall are insignificant.
测压孔在壁上造成的间断性可以忽略不计. 换一句
您还可以临摹下单词：
insignificant
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- 释义：
- n. 方程（式）
- 构词：
- equate[v.同等看待,使相等]+ion表名词→n.[数学]等式,方程式;[with]相等;均衡
- 例句：
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The solution can be expressed by a mathematical equation.
答案可用一个数学方程式来表示. 换一句 -
There is an equation between unemployment and rising crime levels.
失业人数增加则犯罪数量增加. 换一句 -
The availability of public transport is also part of the equation.
公共交通的便利也是考虑因素之一. 换一句
您还可以临摹下单词：
equation
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- 释义：
- vi. 腐烂，腐朽
- 构词：
- de向下+cay落下→向下掉→衰退
- 例句：
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The decay of the meat could have been prevented by proper refrigeration.
如果经过适当的冷藏,这些肉本来不至于腐烂掉. 换一句 -
Bacteria sticks to food debris in the teeth, causing decay.
细菌附着在牙缝中的食物残渣上, 导致蛀牙. 换一句 -
The wood is treated with preservative to prevent decay.
这块木头用防腐剂处理过以防止腐烂. 换一句
您还可以临摹下单词：
decay
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- 释义：
- adj. 值得注意的，异常的，非凡的
- 例句：
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She has made remarkable headway in her writing skills.
她在写作技巧方面有了长足进步. 换一句 -
I owe the restoration of my hearing to this remarkable new technique.
我之所以能恢复听觉完全是因为采用了这项非凡的新技术. 换一句 -
These cars are remarkable for the quietness of their engines.
这些汽车因发动机没有噪音而不同凡响. 换一句
您还可以临摹下单词：
remarkable
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- 释义：
- n. 半导体
- 构词：
- semi半+conductor导体→n.半导体
- 例句：
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Semiconductor devices can perform a variety of control functions in electronic equipment.
半导体器件在电子设备中能起各式各样的控制作用. 换一句 -
In semiconductor receivers transistors take the place of vacuum tubes.
在半导体收音机中晶体管代替了真空管. 换一句 -
This is a semiconductor integrated circuit.
这是一个半导体集成电路. 换一句
您还可以临摹下单词：
semiconductor
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- 释义：
- n. 梭子；航天飞机
- 例句：
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The shuttle often got stuck, causing a lot of broken ends.
梭子常常卡住, 造成大量断头. 换一句 -
The supermarket operates a complimentary shuttle service.
这家超市提供免费购物班车. 换一句 -
The space shuttle undertook a topsecret mission with a military payload under Pentagon control.
航天飞机执行一项绝密使命,使军用酬载由五角大楼控制. 换一句
您还可以临摹下单词：
shuttle
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