You must act quickly.

你必须快速反应。

youdao

To progress you must act; to progress quickly, you must act daily.

要有进步必须有所行动，要迅速进步就要每日行动。

youdao

You must be able to change your mind and act quickly.

你要学会快速的调整改变你的心态和行为。

youdao

You must be able to change your mind and act quickly.

你要学会快速的调整改变你的心态和行为。

youdao