He made a serious mistake的意思|示意

But early on he made a serious mistake.

但他早年时犯了一个严重的错误。

He made a serious mistake in spelling. Can you point it out?

他犯了一个宽峻的拼写弊端，您能指出去吗？

At this crucial juncture he lost his head and made a serious mistake.

就在这关键时刻，他头脑发昏，犯了严重的错误。

If I had been there, he would not have made such a serious mistake.

如果我在的话，他就不会犯这么严重的错误了。

Finally it came home sharply to him that he made such a serious mistake.

他终于痛切地认识到他犯了如此严重的错误。

He has made a serious mistake.

他犯了一个严重的错误。