Perfluorocarbon
全氟化碳
🗣️ 情景例句
I have never confirmed that the Roswell base exists, but I can't deny it either.
我从没有说过拉兹威基地存在，但我也不会否认。
He lives twice who lives well.
生活得好的等于生活了两次。
If I work in the garden, I have to sit down and rest every five minutes.
如果我在花园里干活，每5分钟就得坐下来休息。