This is my computer.

这是我的电脑。

You’d better remember this: Smile to everyone.

你最好记住这一点：对每个人微笑。

Get out of this room.

离开这个房间。

They wanted to show us this point: She is innocent.

他们想告诉我们以下观点：她是无辜的。

this evening / year

今晚/今年

You need to cut about this much off the end of the pipe.

你需要把管头切下大约这么多。