一鼓作气的英文：
[Literal Meaning]
first/drum/pluck up/morale
to pluck up courage with the first drum

[解释]
趁力气大的时候鼓起干劲，一口气把工作做完。

[Explanation]
to finish something without let-up while their spirits are rising.

[例子]
团长喊：“兄弟们，敌人快不行了，让我们一鼓作气把他们消灭！”

[Example]
The regimental commander yelled,

Make one vigorous effort;with one effort
一鼓作气

They pressed on without letup until they got to the top of the hill
他们一鼓作气爬上山顶。

The climbers kept on in the hope of reaching the top with one last effort
登山队员们继续前进,希望最后一鼓作气到达峰顶。