Pentafluorinated
五氟化的
🗣️ 情景例句
I agree. I appreciate your helping me, Jack.
我同意，谢谢你的帮助杰克。
We would like to know how you will pack the silk shirts.
我们想知道你们如何包装这些真丝衬衫。
It's six o'clock.
六点钟了。