Polyphosphate
多磷酸盐
🗣️ 情景例句
It is.
它是的。
He falls down the stairs.
他从楼梯摔了下来。
I turned to look at the children, but there weren't any in sight: they had all run away! The man laughed when he realized what had happened.
我转过头去看那些孩子，但一个也不见，全都跑了！当那个人明白了发生的事情时，笑了起来。