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
Or religion unless you know them very well.
除非你和对方很熟。
Take care of small sums and the large will take care of themselves.
省小钱才能积大财。
It was a lazy, breezy autumn afternoon.
这是一个懒散的，起风的秋日下午。