How come there's no fourth floor？
这里怎么没四楼？
Four is an unlucky number.
四是不吉利的数字。
Hotels here often have no fourth floor.
这里的饭店常常没有四楼。
I know what I wanted to ask.
我想起来我要问你的问题了。
How much should I tip this guy？
我应该给这位老兄多少小费？
People don't usually tip here.
这里大家不习惯给小费。
$50 should be more than enough.
50块应该绰绰有余了。
$50 should be fine.
50块应该可以。
$50 would do.
50块就可以了。