我打开它，这是铅笔。

I open it now. And here is the pencil.

youdao

我打开它——信很短。

I opened it — it was very short.

youdao

我打开它。

I turned it on.

youdao

It makes sense to me logically that I want to see it first when I open the file; so I scroll on down but only later is increment declared.

这个逻辑上对我是有意义的，打开文件的时候,我想先看到它，所以我向下翻,之后才声明increment函数。

哈佛公开课 - 计算机科学课程节选

That's a really good question because if I open this up, why wouldn't it just reform with itself, why would it want to have this in here?

这是个很好的问题,如果我把质粒打开,为什么它不会自己合上,为什么它会与DNA片段重组呢

耶鲁公开课 - 生物医学工程探索课程节选