Valid 有效的，合法的通常指证件等合法、有效

operative指法津、法规，规定等“有效的”

effective常指方法或措施有效，强调能达到预期效果

efficient可以指人有能力或指某方法

Before the tourists set off, they spent much time setting a limit to the expenses of the trip. ?

在游客出发之前，他们花很多时间设定旅途花费的限额。?

“Tina looks especially pretty tonight.” ?

“Yes, she always looks her best in a dress of that color.” dress指一切衣服；a dress表示一件女衫。 ?

meet the demand of 满足(某人等)的需要

meet the demand for 满足对……的需要

exposure of sth. 对……的暴露

exposure to sth. 暴露在……

According to the acoustics, continual exposure to noise of high intensity would lead to loss of hearing.

根据声学，持续暴露在高强度噪音下，会导致失聪。?

They will never reconcile themselves to their defeat. (甘心, 接受)

The matter is not to be trifled with. 这个问题不可轻视。

stumble upon偶然找到，发现

While doing calculation for the project, the designers stumbled upon a new solution to a geological problem.

在对工程进行计算时，设计人员碰巧找到了解决地质问题的方法。?

of late 近来 (当这个词用于句中时，要用完成时态)

They have visited the park of late.?

他们最近参观了那个公园。

I’d just as soon宁愿 (后面的宾语从句要用虚拟语气)

I’d just as soon you did’t take those important papers with you.?我倒宁愿你没有把那些重要文件带在身上。?

The theme of the novel is that a person’s fate is closely tired up with that of the wh

ole country.?

个人命运是与国家命运紧密联系在一起的。

My brother has decided to become a policeman, come what may.?不论发生什么事，我弟弟都决心成为一名警察。

come what may相当于whatever may happen 不论发生什么情况 (固定用法,其中come是用动词原形，may有时也可用will替换,在这一用法中，主谓必须倒装)?

I wish to go home with you, may I??

simulate假充，冒充

stimulate刺激，激发

be disgusted with对……厌恶

get acquainted with 开始认识某人，开始了解某事

steal sth. from sb.

rick sb. out of sth骗去某人的东西

rob sb. of sth抢劫某人的东西

deceive sb. into doing sth.骗某人做某事。 ?

“How much money do you need?”?

“Well, $200 will see me through.”?

“你需要多少钱?”“嗯，200美元可使我渡过难关。”