他总是嘲笑别人是失败者，却从不反省自己。

He always laughs at others as ___losers, but never reflects on himself.

学生们认为他是个失败者，因为他总是独自吃午餐。

The students thought he was a ___loser because he always ate lunch alone.

这款手机电池续航太差，真是个失败品。

This phone's battery life is terrible - it's a complete ___failure.