be engaged in的用法和樣例：
例句
用作及物動(dòng)詞 (vt.)
- We are engaged in writing a letter.
我們正忙于寫(xiě)信。 - He was employed in watering the garden.
他忙于給花園里的花木澆水。 - He is engaged in the development of his business.
他正致力于發(fā)展他的營(yíng)業(yè)。 - He went to work in astronomy looking for new stars.
他開(kāi)始致力于天文工作，尋找新的恒星。
詞匯搭配
- be engaged in 忙于 ...
