Pentafluorinated
五氟化的
🗣️ 情景例句
He says he'll get up at six tomorrow morning, but he'll never make it.
他说他明天早上要6点起床，但他是绝对做不到的。
A man can do no more than he can.
凡事只能量力而行。
He has worked there since it opened in 1989.
从1989年这家工厂开办起，他就在这儿工作。