我这腿不争气，最后一圈我跑不动了。

My legs failed me and I wasn't able to run the last lap.

youdao

他这个人真不争气。

This chap has let us down.

《新英汉大辞典》

我已经知道那些个不争气的车子。

I already knew about the lousy cars.

youdao

但我不争气，我甚至不敢叫你的名字。

But I'm not smart, I don't even dare to call you by name.

youdao

你不用担心我会抛弃你，除非你自己不争气。

You need not be afraid of my deserting you, unless you give me cause.

youdao

说起他的那个不争气的儿子，老父亲勃然大怒。

Talking of his disappointing son, the old father flew into a rage.

youdao

忽然想起你，笑了笑自己，怪自己不争气又想起了你。

Suddenly think of you, laugh yourself, blame myself and think of you.

youdao

忽然想起你，笑了笑自己，怪自己不争气又想起了你。

Suddenly think of you, laugh yourself, blame myself and think of you.

youdao