Alkalion
羟离子, 氢氧离子
🗣️ 情景例句
Did you finish the ...?
你完成了……吗？
I don't think it's four o'clock yet.
我认为现在还不到四点。
As it happens, a razor that is safe in Europe is unlikely to electrocute Americans.
碰巧在欧洲使用安全的剃须刀不大可能使美国人触电身亡，