He was careful and diligent. I was all over the place.
他细心且勤奋，我则稀里糊涂。
The historical research was impressively diligent.
该项历史研究非常地认真、彻底。
Meyers is a diligent and prolific worker
迈耶斯是个勤奋多产的工人。
She made a diligent effort to learn English.
她勤奋地学习英语。
After a diligent search, he found the key under his pillow.
经过仔细寻找，他在枕头下面找到了钥匙。