认真的英文：
earnest

参考例句：

Eleanor was brusque and firm and businesslike.
埃莉诺态度粗暴，意志坚定、办事认真。

We'll get to grips with the problem very soon
我们将会很快认真处理这个问题。

He carefully read the proceedings from last meeting.
他认真阅读了上次会议的记录。

My son' s reaction to the letter was somewhat indifferent.
我儿子并不认真把这封信当回事。

He did his best, therefore, to achieve a mood half sportive and half thoughtful'
于是他尽其所能培养一种半开玩笑半认真的心情。

Take .. seriously; take .. for serious
对..认真

Intense study
认真的研究

I mean it. I'm serious. I'm no kidding!
我是认真的

Be assiduous in one's duties
认真执行任务

I' m in deadly earnest.
我是非常认真的.

earnest是什么意思：
adj. 认真的，热心的，诚挚的；重要的
n. 认真，热心，诚挚；定金

I' m in deadly earnest.
我是非常认真的.

Life is illusionless! Life is earnest!
生命不是虚幻的!生活是严肃的!

I'm in deadly earnest.
我是非常认真的。

Ella was a pious, earnest woman.
埃拉是个虔诚、认真的女人。

Life is real, life is earnest.
人生是真实的，人生是重要的。