Perfluorocarbon
全氟化碳
🗣️ 情景例句
I know. How old is she?
我知道。她多大了？
The typewriter is out of order.
这打字机出毛病了。
He has to deduce what he can from the few scanty clues available.
他们必须根据现有的不充分的线索进行推理。