1  a horse pill 大药丸，大型丸剂。

This is not a horse pill. This is your pain pill which doctor prescribed.

这不是大药片。这就是医生给你开的止疼药。

2  a horse laugh 狂笑，讥笑，不信任的笑。

At the end of the joke she gave a horse laugh that could be heard a street away.

在那个笑话结束时，她发出一阵狂笑，隔着一条街都能听到。

3  a horse of a different color 完全是另一回事。

Taking the exam is one thing but passing it is a horse of a different color.

考试是一回事；通过考试又是另一回事。

4  be on one's high horse 趾高气扬，藐视他人。

Since Bob was elected president of the club, he's been up on his high horse.

自从鲍勃当选为俱乐部主席以来，他就趾高气扬起来了。

5  beat a dead horse 徒劳无益，白费口舌。

I hate to beat a dead horse, but it is very important that you understand this before you leave.

我不想多此一举，但你离开以前必须了解这个。