And already we have cars that park themselves,collision avoidance systems that the car tells you that you're about to hit something or back into something.

VOA: special.2011.06.21

I would think that it would approach inifinity, and I would need to think about it and get back to you in terms of why we don't actually hit it and see something with an infinite wavelength.

我会认为波长会接近无穷大，而且我需要考虑一下,然后返回来告诉你,为什么我们没有说对,为什么我们没有看到,无穷大波长的东西。

麻省理工公开课 - 化学原理课程节选

You knew it was time to start clapping as soon as that chord hit that, it stopped going back and forth,tonic,dominant,just sitting there.

你知道在这个和弦出来的时候要拍手，然后停下来，来回的行进，而主音，属音，然后保持住。

耶鲁公开课 - 聆听音乐课程节选

And he gave a very good analogy in saying, "It was almost as incredible as if you'd fired a 15 inch shell at a piece of tissue paper, and it came back and hit you."

他还打过一个很好的比方：,“这就像是,你用个15英寸果壳,打到面巾纸上被弹回来打到你，一样不可思议，“

麻省理工公开课 - 化学原理课程节选

If you're hit, you might feel pain or bounce back or something.

如果被打了，你会感到疼痛,或是迅速恢复。

耶鲁公开课 - 心理学导论课程节选

So if you've ever seen or used an old school typewriter, you might recall that when you're typing something out on an old mechanical typewriter, - when you like hit the char-- when you hit the enter key to move the head back to the left hand side to the next line or you would pull down some lever, it was really a two part process.

如果你们有谁曾经看过或用过老式打字机，可能还记得，当你在,这种老式打字机上打字的时候，当你-,敲入回车键，跳转到,下一行的最左边，或者,拉一下杆，这个需要两步走。

哈佛公开课 - 计算机科学课程节选

What you'll notice is this hit and this hand went back up.

你们会看到,先有撞击,然后手会回到原先的高度

耶鲁公开课 - 心理学导论课程节选