Failure is the mother of success.
失败是成功之母

He has failed in his experiments many times,but he believes that failure is the mother of success.
他在实验中多次失败，但他仍然相信失败是成功之母。
As an old saying goes,"Failure is the mother of success",you should find out why you have failed.
有句老话说，失败是成功之母，你应该找出失败的原因。

A:Steven,would you like to go dance with me?
史蒂芬，今晚和我们一起去跳舞怎么样？
B:John,I am just not in the mood for this.
约翰，我现在没那个心情。
A:You look so upset.What's going on?
你看起来很沮丧，怎么回事？
B:I lost the table tennis game yesterday.
昨天在乒乓球比赛中，我输了。
A:What a pity.
真遗憾。
B:I just don't want to play table tennis any more.
我不想再打乒乓球了。
A:Is it that bad?It's nothing more than a game.
有那么糟糕吗？不过是输掉一场比赛而已。
B:My opponent bowled me with the very first ball.I was wondering If it's appropriate for me to play table tennis.
我的对手一球就把我淘汰了。我在想可能是我不太适合打乒乓球吧。
A:Come on!Failure is the mother of success.Don't lose heart.I'm sure you'll succeed.
别这样，失败是成功之母，不要灰心，我相信你一定会成功的。
B:perhaps you are right.But I still need some time to recover from the failure.
或许你说的对，但是我仍然需要一些时间从失败中恢复过来。
A:I understand.
我能理解你。