Delrin
迭尔林(聚甲醛树酯)
🗣️ 情景例句
You've got lots of time to improve your English.
你已经花了好多时间去提高你的英语水平。
Failure is the mother of success.
失败是成功之母。
No, it isn't! That's a cat!
不，不在！那是一只猫。