be engaged in

• vt. 忙于 ...； 致力于 ...

例句

用作及物动词 (vt.)

1. We are engaged in writing a letter.
   我们正忙于写信。
2. He was employed in watering the garden.
   他忙于给花园里的花木浇水。
3. He is engaged in the development of his business.
   他正致力于发展他的营业。
4. He went to work in astronomy looking for new stars.
   他开始致力于天文工作，寻找新的恒星。

词汇搭配

• be engaged in 忙于 ...