hard-working

The farm's success is due to its hard-working employees who start their day at dawn.

(Chinese) 农场的成功归功于其勤奋的员工，他们黎明时分就开始工作。

She is a hard-working student who often stays in the library until it closes at midnight.

(Chinese) 她是一个勤奋的学生，经常在图书馆待到午夜闭馆。