Polysubstituted
多取代的
🗣️ 情景例句
He didn't want to borrow any money.
他不想借钱。
It's a small world.
世界真小！
gravity is the force that drives them in a continual attempt to restore the ocean surface to a flat plain.
地球引力是持续不断企图使海面复原为平面的力量。