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
Who am I, you old rascal?
我是谁 ？你这个老玩童。
Please make an appointment with my secretary.
请跟我秘书定个见面时间。
She does, doesn't she! I read she's twenty-nine,- but she must be at least forty.
是的，谁说不是呢！我从报上看到她是29岁，但她一定至少有40岁了。