Polycations
(polycation 的复数) 聚阳离子
🗣️ 情景例句
I understand.
我了解。
Congratulations on your success in the election.
我恭喜你当选了。
The big clock which used to strike the hours day and night was damaged many years ago and has been silent ever since.
教堂的钟很大，以前不分昼夜打点报时，但很多年前遭到毁坏，从此便无声无息了。