你知道蝴蝶在变为我们所熟悉的飞虫形态之前，经历过三种不同的形态吗？

Do you know that butterflies live three separate lives before they become the flying insects we all know?

youdao

我知道这些，因为在我们相遇之前，你给我看了你关于这天的日记。

I know this because, before we met, you showed me your diary and you wrote about this day.

youdao

我们知道我们的流程在活动a执行之前事实3发生的可能性和概率非常小。

Knowing our process we determined that the likelihood and probability of Fact 3 occurring before activity a is extremely low.

youdao

I have no idea what's here at the moment so I'm just going to draw a question mark because that memory might have been used previously for some other purpose, but we know it's currently available to us so we have four bytes of memory.

我不知道在此刻这里是什么,所以我画一个问号，因为那块内存可能在之前,为其它的目的而使用过，但是我们知道它可以为我们所使用,这样我们就有4个字节的内存。

哈佛公开课 - 计算机科学课程节选

It used to be thought before people were very careful- we know that they do every terrible thing in the world in the Peloponnesian War.

人们谨慎行事之前曾考虑过,我们知道他们在伯罗奔尼撒战争中,做尽了世上的恶事

耶鲁公开课 - 古希腊历史简介课程节选

psi So we're going to for psi, and before that, we're going to figure out that instead of n just that one quantum number n, we're going to have a few other quantum numbers that fall out of solving the Schrodinger equation for what psi is.

我们要讲到，但在这之前，我们已经知道了,主量子数，现在我们需要知道，其他一些,解psi的薛定谔方程,所需要的量子数。

麻省理工公开课 - 化学原理课程节选