Keep your promise and work in earnest;
信守承诺，认真办事；
At last he has settled to his work in earnest.
最后他安心认真地干起他的工作来。
On his return from the countryside he set to work in earnest.
他从乡下回来之后，就认真干起来了。
The work on the house will begin in earnest on Monday.
这栋房子的修建工作将在星期一正式开始。
It's enough if you work hard and in earnest.
认真和努力了，这就已经足够了。
她工作很认真。
她工作很认真。
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