diligent的词源为dilig
例句
1、
He was careful and diligent. I was all over the place.
他细心且勤奋，我则稀里糊涂。
2、
The historical research was impressively diligent.
该项历史研究非常地认真、彻底。
3、
Meyers is a diligent and prolific worker
迈耶斯是个勤奋多产的工人。
