for pity's sake

1. 务请

For pity's sake be quiet for a moment and let me finish my paper.

请安静一会, 让我把论文写好。

have/take pity on

1. 怜悯

The old lady often takes pity on small animals.

那位老太太常常怜悯小动物。

more's the pity

1. 遗憾

I won't be able to come to dinner today, more's the pity.

今天我不能赴晚宴, 十分遗憾。

out of pity

1. 出于怜悯

I don't want anybody to help me out of pity.

我不要任何人出于怜悯来帮助我。