起劲的英文：
vigorously
energetically
enthusiastically

参考例句：

They all played vigorously.
他们都打得很起劲。

She wiped vigorously but the stain remained.
她擦得很起劲却没有把污迹抹掉。

Keep your pecker up.Things are bound to improve next week.
鼓起劲来，下星期情况一定会好起来的。

Your lack of interest will work against you when your employer gets to know.
你工作不起劲，老板要是知道就会对你不利。

Pull your socks up.
把你的袜子往上拉拉。(英俚)鼓起劲来！

In spite of my efforts the Boy remained passive.
尽管我努力，那男孩还是不起劲。

For all the frenzied activity and gung-ho talk, it may be some time before we wee the promise of the new techniques.
尽管干得疯狂、说得起劲，真正看到这种新技术的前途尚需时日。

As the hounds hit the fresh scent, they howled, and Rainsford knew how an animal at bay feels.
猎犬嗅出了新的踪迹，叫得更起劲了，雷恩斯福德那时体会到了当困兽的感觉。

He paused, dispirited despite his effort to get a cheerful note into his voice
他停了一下，虽然尽量想使声调显得愉快些，但还是提不起劲来。

Mr. Giovanelli bade him farewell with a too emphatic flourish of the hat.
乔伐耐里先生同他说再会的时候，手中的帽子好像挥得太起劲了一点。

vigorously是什么意思：
adv. 活泼地；精力充沛地；用力地

She was a fresh and vigorous woman.
她原本是一个精神饱满、爱生活的女人。

He was a vigorous, brisk person.
他是一个强壮的，活泼有力的人。

He is a vigorous young man.
他是精力充沛的青年。

energetically是什么意思：
ad. 精力充沛地,积极地

He is an energetic tennis player.
他是个精力充沛的网球手。

This world belongs to the energetic
世界属于精力旺盛的人

The elderly man is quite energetic.
这位上了年纪的老人仍精力充沛。

enthusiastically是什么意思：
adv. 热心地，满腔热情地

Paul was an enthusiast.
保罗是个狂热的信徒。

They acknowledged the enthusiastic plaudits of the crowd.
他们对人群中爆发的热烈喝采答礼。

In these matters Olympias was an expert and an enthusiast
在这些事情上，奥林匹阿斯是个内行，是个热衷的人。