他已经有一个更好的计划。

He had something better planned.

youdao

我已经有一个牙医了。

I already have a dentist.

youdao

从我决定尝试过一种更环保的生活到现在已经有一个星期了。

It's been a week since I decided to try to live a more environment-friendly life.

youdao

The reason is because we already have a full valence shell for our hydrogen, it doesn't want any more electrons.

原因是因为我们的氢,已经有一个排满的价壳层了，它不再需要多余的电子了。

麻省理工公开课 - 化学原理课程节选

And even more scary than that, a friend of mine is married, and his wife was walking to church one morning.

更可怕的是，我的一个已经结了婚的朋友，有一天早上当他老婆正往教堂走时，

在上西区 - SpeakingMax英语口语达人

So if we take a look at nitrogen here, what you'll notice is we have thre available for bonding, - and we already have our lone pair -- one of our orbitals is already filled up.

如果我们看一下氮原子，我们注意到我们可以成3个键，我们已经有一个孤对-,其中的一个轨道已经被填满了。

麻省理工公开课 - 化学原理课程节选