丧失干劲to lose heart
泄气松劲
lose heart and slack off
不能泄群众的气
cannot make the masses lose heart
别泄气!
Don't lose heart!
在困难面前他并不泄气。
He does not lose heart in the face of difficulty.
软弱不中用pathetic
你一天二十里路都走不到，太泄气了。
It's pathetic – you can't even walk twenty.
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