Definition
to initiate action when a necessity or opportunity arises
見機行事
During the group discussion, he stepped up by proposing new ideas, demonstrating his leadership skills.
在小組討論中，他主動提出新想法，展現了他的領導能力。
In the face of challenges, she decided to step up her efforts and overcome the difficulties.
面對挑戰，她決定加大努力並克服困難。
The upcoming volunteer event needs more participants, and they hope community members will step up.
即將到來的志工活動需要更多參與者，他們希望社區成員能主動參與。