Definition: doing a lot of things, or moving around a lot Level: B1
他55岁时仍然是一个活跃的跑步者。
He was still an ___active runner at 55.
保持活跃并进行定期锻炼很重要。
It's important to stay ___active and get regular exercise.
Nico是一个非常活跃的人，我很喜欢和他一起外出。
Nico is a very ___active guy and I enjoyed going out with him very much.
