I am sorry that he should be so half-hearted about the important work.

我很遗憾，他对这项重要工作竟这样敷衍塞责。

《新英汉大辞典》

He's half-hearted about his work.

他工作三心二意的。

youdao

She is half-hearted to do her work.

她对自己的工作不热心。

youdao

She is half-hearted to do her work.

她对自己的工作不热心。

youdao