A: You should not have criticize your son in front of his friends.

你不应该在你儿子的朋友的面批评他。

B: Why? He did something wrong.

为什么?他做错事了。

A: I know. But at that time your blame is rubbing salt into his wounds.

我知道，但是你的批评是在他的伤口上撒盐。

A: I only wanted to help him.

我只想帮助他。

B: But it is not the right time.

但是时机不对。