那种一回头你就在身后的感觉真的很好。

That kind of look back at you behind the feeling is really good.

youdao

我这一生饮过的酒，流过的泪，都不及你一回头苦涩。

My whole life to drink the wine, the flow of tears, is not as you turn back bitter.

youdao

当你一回头，发现所买商品旁边的那个更好，你就会不停地捶胸顿足。

You’ll kick yourself repeatedly when you look back and see that the one right next to the one you bought was better.

youdao

Well, if I go through that, the wavelength of such a photon is going to be so big that I am back to measuring the dimension of the human hair with the yardstick.

好的，如果我做完了这个，那个一光子的的波长将成为,我将回头测量的,用一个尺度测量出人头发的尺寸。

麻省理工公开课 - 固态化学导论课程节选