Polyolefin
n. [化]聚烯烃
🗣️ 情景例句
Yes.
是的。
He falls down the stairs.
他从楼梯摔了下来。
One can tell the difference almost at a glance, for a spider always has eight legs and insect never more than six.
人们几乎一眼就能看出二者的差异，因为蜘蛛都是8条腿，而昆虫的腿从不超过6条。