Polyolefine
[化] 聚烯烃
🗣️ 情景例句
Let's get the ball rolling.
让我们开始吧。
I'm afraid I have bad news for you.
恐怕我有坏消息要告诉您。
Ever since, people have had difficulty in deciding whether the craft should be ranged among ships,
自那以后，人们很难决定是否应该将这种运载工具列为轮船、