Prechlorination
预加氯
🗣️ 情景例句
How was your day?
今天好吗？
Thank you for inviting us; we had a wonderful time.
谢谢您的邀请，使我们过得很快乐。
She can't come. She has to help her Mommy!
她不能来。她得帮她妈妈的忙！