Polycations
(polycation 的复数) 聚阳离子
🗣️ 情景例句
And my grandfather.
还有我祖父。
I'd like a bowl of tomato soup,please.
请给我一碗西红柿汤。
Which may keep company with the vessel for an hour without visible or more than occasional movement of wing.
它们随船飞行一小时也难得见其扇动一下翅膀。