able to move your body quickly and easily

Monkeys are very agile climbers. 猴子动作敏捷，善于攀援。

You need to have agile fingers to do this kind of work. 从事这种工作，手指必须非常灵巧。

able to think quickly and clearly

For a man of 80, he has a remarkably agile mind. 对于一个80岁的老人来说，他才思惊人地敏捷。

used for describing ways of planning and doing work in which it is understood that making changes as they are needed is an important part of the job