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。

youdao

Team spirit: to settle down to work in earnest for one's own duty and focus on coordination, steadiness, preciseness, applicability and actual effect.

团队精神踏踏实实认认真真地做好自已的本职工作，工作中注重协调，稳健，严谨，实效，适用。

youdao

We hope relevant countries work along with China to implement the Declaration on the Conduct of Parties in the South China Sea and safeguard peace and stability of the South China Sea in real earnest.

我们希望有关国家与中方一道，切实落实《南海各方行为宣言》，维护南海地区的和平稳定。

youdao

Now that a settlement has been reached, eager lawyers can get to work in earnest on class-action lawsuits on investors' behalf.

ECONOMIST: The Wall Street settlement

And on July 16th it delayed its second gathering until August, when it hopes to start work in earnest.

ECONOMIST: Haiti's earthquake

The requesting Inspectors General are tasked with overseeing investigations that can take multiple years to complete, and the oversight work often begins in earnest during the final phases of a project.

WHITEHOUSE: The White House