Polycations
(polycation 的复数) 聚阳离子
🗣️ 情景例句
Excuse me, Susan.
对不起 ，Susan。
Truth is honest, truth is sure; Truth is strong and must endure.
真理不会骗人，切实无假；真理的力量强大，永存不垮。
The killing of the bison changed the whole wildlife of the plains. With fewer bison, grass shoots were not eaten, so grass did not grow as strongly.
屠宰野牛改变了平原的全部野生生物。野牛少了，嫩草没有牛来吃了，草就长得不粗壮。