努力做

• stick at
• drive away at
• work on (upon)
• hammer away at

例句

1. 他努力做一件工作。
   He laboured at a task.
2. 罗伯特是个乐于干活的人。我知道他会尽自己最大努力做好我们给他的工作的。
   Robert is a willing horse and I know he'll try his best to do all the work we give him.
3. 这所学校在时间安排上努力做到文理并重。
   This school aims to balance the amount of time spent on arts and science subjects.