Electroultrafiltration
电超滤作用
🗣️ 情景例句
Mmm-hmm. Thanks.
嗯。谢谢。
I'm always disappointed when I don't get any mail.
当我收不到任何邮件时，我总是很失望。
I was very tired when I arrived home. I'd been working hard all day.
我到家时非常累。我一整天都在玩命地干！