To get around the first problem, scientists studying liquid ventilation work with liquids made up of perfluorocarbons, or PFCs, instead of water.

为了解决第一个问题，研究液体通风的科学家们使用由全氟化碳或 PFC 组成的液体代替水。

PFCs are specially designed hydrocarbons, or molecules made up of carbon and hydrogen, where some of the hydrogens have been replaced with fluorine.

PFC 是专门设计的碳氢化合物， 或由碳和氢组成的分子，其中一些氢已被氟取代。