Polycyclization
聚环作用
🗣️ 情景例句
I would prefer a non-smoking room.
我想要一间不许吸烟的房间。
Friendship multiplies joys and divides griefs.
友谊可以增添欢乐，可以分担忧愁。
She's sitting under the tree.
她正在树荫下坐着。