Polyolefin
n. [化]聚烯烃
🗣️ 情景例句
No. Will you also initial this change on page 2, please?
不，请你也在第二页变更处签姓名的一个字母好吗？
Have you milked the cows?
你已经挤过奶了吗？
At that time he had two helpers.
那时他有两个帮手。