劲头的英文：
eagerness
enthusiasm

参考例句：

Lose momentum
丧失劲头,失势

He was full of drive in his work.
他工作有劲头。

In our plant, technical innovation gets up steam
我们厂的技术革新的劲头增加了。

The more afraid you are and the more weakness you show, the more aggressive others will be.
你越怕，越示弱，人家劲头就越大。

The runner is still going strong on the last lap.
那个赛跑运动员在跑最后一圈时仍然劲头很足.

This dramatic vigour is the chief strength of puritan writing
这种生气勃勃的劲头便是清教时期写作的主要动力。

He had been disconcerted by the air of proprietorship she assumed over him
她所表现出来的那种要独占他的劲头使他狼狈。

He pushed his black-and-white views of international affairs with bluff naval persistence
他用海军军人那种粗鲁顽强的劲头，硬要别人接受他对国际事务的绝对化见解。

There was in him the heartiness and intolerant joviality of the prosperous farmer
在他身上有种生意昌隆的农场主常常表现出的春风得意欢天喜地的劲头，叫人消受不了。

In the rainy season the clouds would bank up about midday, and showers fall with true tropical violence
在雨季，云在中午时分堆积起来，接着便以十足的热带暴雨劲头下起阵雨来。

eagerness是什么意思：
n. 渴望，热心

She is eager for success.
她渴望成功。

They are eager to have a glance at the bride and bridegroom.
他们都急切地想看一看新郎和新娘。

The man is an eager beaver.
那人工作很卖力。

He is ready, even eager to go.
他乐意甚至可以说渴望前去。

Haig was desperately eager for an affirmative answer.
黑格非常渴望得到一个肯定的回答。

enthusiasm是什么意思：
n. 热心，热情，热忱

He was ablaze with enthusiasm.
他热情洋溢。

Nothing is so contagious as enthusiasm.
热情是最富有感染力的。

Father discourage the expression of enthusiasm.
父亲不准有热情的表示。

Enthusiasm is very catching.
热情非常富有感染力。

His enthusiasm was in no way flagging.
他的热情丝毫未减。