1. 大家都认为物理最难，但结果考得最好的就是物理。（contrary to）
All of us thought physics is the most difficult subject. Contrary to what we thought, we did best in the physics test.
2. 英语老师总是强调说英语最重要，其它学科的老师在谈及学习的重要性时往往也是这样说自己的学科。（it’s the case）
English teacher often says English is the most important subject. It is the case with the teachers of other subjects when speaking of the importance of learning.
3. 牺牲睡眠来准备考试值不值？（at the cost of）
Is it worth preparing exam at the cost of sleep?
4. 你最好别费心找什么捷径，应该一步步地积累语言材料。（bother about, build up）(祈使句)
Don’t bother about any shortcut! Do build up your vocabulary step by step.
Educators consider net-addition a kind of mental illness.
6. 碰到要自己动手做实验，李敏总是第一个自告奋勇。（when it comes to ）
When it comes to DIY experiment, Li Ming is always the first to volunteer.
7. 明明在拼生词比赛中夺冠，他被称作活词典。（come out）
Min Min came out No. 1 in the spelling Contest, and was prasied as a walking dictionary.
8. 正是人类活动导致今日的全球变暖。（contribute to）(It 强调句)
It is human activities that contribute to the global warming today.
The ever-increasing population in cities is a universal hot potato to the governments worldwide。
10. 禁止鸣号(horning)是把双刃剑。一方面它减少了噪音，可另一方面它会导致更多交通事故。（two-edged sword）
The banning of horning is like a two-edged sword. On one hand, it reduces noise pollution; on the other hand, it leads to more road accidents.
11. 随着电脑用户猛增，电脑诈骗（cyber frauds）同样猛增。抑制这类诈骗是个迫在眉睫的问题。（with结构）
With the PC users increasing fast, cyber frauds spring up as fast. To check them becomes a burning question.
The IQ test has been widely used in schools to evaluate students’ abilities.
13. 尽管无人设备早已登上火星，可是载人登火星的使命还是遥遥无期。（unmanned, manned mission）
Though unmanned equipment has already landed on Mars, manned mission on Mars is still faraway in the future.
The belief that the number “8“ is lucky is not based on science. It’s superstitious.
The public support the measures to limit the free use of plastic bags.
The Chinese have been dreaming of landing on Moon. In near future this dream will come true.
17. 就发明的品种而言，爱迪生在现代史上绝无仅有。（next to none）
In terms of the kinds of invention, Edison is next to none in modern history.
With the DNA technology available, the police can find out criminals faster and more easily。
The Bird’s Nest is a well-designed and well-constructed stadium.
Wang Min returned the large sum of money she picked up to the owner and firmly declined any reward from him.