Polyolefin
n. [化]聚烯烃
🗣️ 情景例句
Yes, I think it's important for me to be there
是的 ，我想我在场是非常重要的。
Do not hallo till you are out of the wood.
未出险境，先莫高兴。
He had known that it was not safe to travel alone in the forest near the coast.
也听说过独自一人在海边的森林里走是不安全的。