Keeping a proper balance between study and rest keeps us energetic.
在學習和休息之間保持適當?shù)钠胶猓苁刮覀兙Τ渑妗?/p>
We become more energetic, more alert, better able to take effective action.
我們變得更有活力、更警覺、更有能力采取有效的行動。
You should exercise more so as to keep energetic and you can work efficiently.
你應該多運動以保持精力充沛，才可以有效地工作。