Superchlorination
过氯化作用
🗣️ 情景例句
We'd like to discuss a mortgage.
我们想请教一下贷款的事。
Buy one get one free.
买一送一。
We don't like the same colours, either.On our birthday, we often get the same presents.
我们对颜色的喜爱也不一样。每逢过生日，我们经常得到一样的礼物。