Perfluorocarbon
全氟化碳
🗣️ 情景例句
This is a good deal: buy 1, get 1 free.
这可是个好买卖：买一送一。
Bare words, no bargain.
空言不能成交易。
there is always something to do in connection with it, from finding the right place for the latest addition, to verifying facts in reference books.
从为新增添的收藏品寻找摆放位置到核对参考书中的事实，总归有事可做。