Prechlorination
预加氯
🗣️ 情景例句
I'd like your help.
我要请你帮忙。
Do you swear to tell the truth, the whole truth, and nothing but the truth?
你发誓据实陈述而决无谎言吗？
I can set up a tour next week.
我可以安排在下个礼拜参观。