Polyolefin
n. [化]聚烯烃
🗣️ 情景例句
I can't figure out why he quit his job.
我不能理解他为什么要辞职。
Whatever happens, don't go back.
不管什么事情发生，你都不要回来。
In the centre of the hall, there were a number of tall structures which contained coloured lights.
展厅中央是装有彩色灯泡的许多高高的构件，