Polyolefin
n. [化]聚烯烃
🗣️ 情景例句
What shades of lipstick do you sell?
你们卖的口红有什么颜色的？
His bad English is a bar to his getting a job.
他的英语很差，这是他找工作的一个障碍。
A temporary rudder was made on board from spare planks and it was fitted with great difficulty.
船员用备用的木板在船上赶制了一只应急用的舵，并克服重重困难将舵安装就位，