Polymethyl
methacrylate [化]聚甲基丙烯酸甲酯
🗣️ 情景例句
Any time.
随时效劳。
Are you looking for a permanent position?
你正在寻找一个固定职位吗？
Were you in San Francisco at the time of the big earthquake in 1989?
1989年旧金山大地震时，你在那儿吗？