查询词典 isnt.

He is your teacher, isnt he?

他是你的老师，是不是？

This is a book, isnt it.

这是一本书，不是吗？

Don:t waste your time on a man ,who isnt willing to waste their time on you .

不要为那些不愿在你身上花费时间的人而浪费你的时间。

But the truth is, that isnt all that I know of the man.

但真实的情况是，我对这个人的了解不仅如此。

This is a very special Mary, isnt it?

这是一个非常特别的 Mary，不是吗？

I hope it isnt...

我希望这并不是。。。

What you are saying now isnt consistent with what you said yesterday.

你现在说的与你昨天说的不一致。

Dont waste your time on a man, who isnt willing to waste their time on you.

不要为那些不愿在你身上花费时间的人而浪费你的时间。

He is a teacher, isnt he ?

他是一个老师，是吗？

Yes, of course, I am, but my mind isnt.

是的，当然，我准备好了，但是有点心烦。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。