Polyisocyanate
n. [化]聚亚安酯
🗣️ 情景例句
This job is back-breaking work.
这份工作强度很大。
The failure drove him hito despair.
这次失败使他绝望。
and it is only in the seas and rivers, and sometimes lakes, where mud and sit have been continuously deposited,
所以只有在泥沙不停淤积的海洋和江河里，有时在湖泊里，