Uldpe
[化] 超低密度聚乙烯
🗣️ 情景例句
It has been a learning experience. That's true.
这真是一次学习经验， 真的。
We are sorry to delay the shipment because our manufacturer has met unexpected difficulties.
恕延期货船，因为我们厂家遇到了预料不到的困难。
Yes. You have to practise a lot.
是的，你得大量的练习。