Polydiolefin
聚二烯烃
🗣️ 情景例句
Keep cool.
保持冷静。
I think you're mistaken about that.
我想你那样不对。
She left home when she was eighteen and has lived in Los Angeles for the past fifteen years.
18岁时，她离开了家。过去的15年里她一直住在洛杉矶。