Mlss
[医][=mixed liquor suspended solid]（有机物和活性污泥）混合液中的悬浮固体
🗣️ 情景例句
I'd better hit the books.
我最好勤奋学习。
You're not yourself today.
你今天不太对劲。
He is respectful to his elders.
他对长辈很恭敬。