Polyfluocarbon
[化] 多氟烃
🗣️ 情景例句
Sorry, but he is out at the moment.
抱歉，他现在出去了？
We know that you are leading exporters of coal and you can provide the quantity we need.
我们知道贵方是主要煤炭出口商，能满足我们的需求量。
Dad, this box is too heavy. We can't carry it.
爸爸，这个箱子太重了，我搬不动。