If dark matter particles exist, scientists say, they should be able to observe a small amount of light given off when they hit the nucleus of a xenon atom.

VOA: special.2009.07.21

Because here what we have is some atom that we're studying, in the case, it's going to be a gas, and we hit it with a photon that has some incident energy.

因为这里我们要研究的是一些原子,在这种情况下，一般是气态的，然后我们令一个,具有一定初始能量的光子打上去。

麻省理工公开课 - 化学原理课程节选

So what syncopation is is simply the insertion of an impulse, a "Hit" If you will, at a metrical place that we do not expect it to be.

所以切分音就是插入的一个冲动,也可以说是一次"撞击",出现在一个我们意料之外的位置

耶鲁公开课 - 聆听音乐课程节选

He says it is poor countries that will be hit hardest by a downturn in oil supplies.

VOA: standard.2009.10.20

What happened in that case is he has learned that the raising of a hand is a signal that he is about to be hit and so he responds to that signal.

在这个例子中，他知道,举起的手臂是他即将挨打的信号,因此他对这个信号作出了反应。

耶鲁公开课 - 心理学导论课程节选

The shutdown is bad news for the recession-hit country partly because it will lose a source of cheap electricity and be forced to import more expensive energy.

VOA: standard.2010.01.01

So what would be the letter A in binary inside of a computer's memory when you hit the letter A on the keyboard, for capital A?

当你敲击键盘上的字母A时,那么在计算机二进制的存储中,字母A是什么样的呢？

哈佛公开课 - 计算机科学课程节选

Britain's Royal Society has released a report looking at how science and technology can be used to fight a food shortage it says is expected to hit the globe by 2050.

VOA: standard.2009.10.21

Because in doing that, Python would then have a value that it could pass on into some other part of a computation, and if it wasn't what I wanted, I might be a long ways downstream in the computation before I actually hit some result that makes no sense.

因为如果这样做的话，Python会将,输入的值传递到下面的,一些运算中去，如果这个值的类型不是我想要的，我可能会在得到,一个毫无意义的结果之前,经历一个很长时间的,计算过程。

麻省理工公开课 - 计算机科学及编程导论课程节选

A long-standing drought, along with recent devastating bushfires and widespread floods have given some scientists more reason to think that the vast continent is likely to be one of the countries hardest hit by a shifting climate.

VOA: standard.2009.05.03

Conference organizer, Dr.Greg Pappas of the American non-governmental organization,or NGO, called Interaction says that while it is too early to tell whether the current outbreak will turn into a global pandemic, poorer countries in particular need to be prepared for the day when one does hit.

VOA: standard.2009.04.28