The lads’ energy pleased him but their recklessness worried him.

小伙子们的劲头使,们的冒失又使担心。

The villagers went at building a dam with a will.

村民们劲头十足地着手修一座水坝。

All her strength drained out when she was discouraged in what she was doing.

当做事遇到挫折时, 她所有的劲头也就停止。

The whole team was on song.

全体队员劲头十足。

I admired the way he never stopped trying. Even when the audience started shouting abuse at him, he sucked it up and continued singing.

我佩服不断努力的那股劲头。即使观众冲叫骂，也能忍耐着继续唱下去。