refrain

He refrained from making jokes during his teacher's farewell speech out of respect.

(Chinese) 出于尊重，他在老师的告别演说中克制住没有开玩笑。

Please refrain from smoking inside the airport terminal to ensure everyone's health.

(Chinese) 为了大家的健康，请勿在机场航站楼内吸烟。

The song has a very catchy refrain that the whole audience sang along with.

(Chinese) 这首歌有一段朗朗上口的副歌，全场观众都跟着一起唱。

I don't know all the lyrics to the verses, but I can hum along during the refrain.

(Chinese) 我不记得主歌的所有歌词，但在副歌部分我可以跟着哼唱。