你总是在那里，你无处不在。

You're always there. You're everywhere.

youdao

无论发生了怎么，你总是在那里。

You were always there, no matter what.

youdao

我会永远记住，每当需要你时，你总是在那儿。

I'll always remember you were there when you were needed.

youdao

The way he described is when you try to get down a quantum dimensions and you are standing there with your camera, just remember the sun is at your back and your shadow is always in the picture.

这种方法被他描述为,当你试着处理一个量子尺寸时,并且你试着拿着你的相机在那，记住太阳在你的背后,而你的影子总是在照片上。

麻省理工公开课 - 固态化学导论课程节选