Polyphosphates
(polyphosphate 的复数) 多磷酸盐
🗣️ 情景例句
Don't go anyplace unsafe.
别去那些不安全的地方。
Do you think you could keep the noise down?
你看能不能小声一些？
But just before the competition closed,
但就在竞赛截止时间将到之际，