Vapour pressure:Between that of I.P.A.and water.'I.P.A.整句话该怎么翻译呢?

英语翻译Vapour pressure of a pure substance is defined as the pressure exerted by its vapour in phase with its liquid at a given temperature这个in phase with应该怎么理解呢？ 英语翻译Boiling is a rapid type of evaporation in which vapour bubbles,forming in the liquide,expand rapidly because their pressure is high enough to overcome atmospheric pressure. Vapour pressure:Between that of I.P.A.and water.'I.P.A.整句话该怎么翻译呢? Vapour pressure:Between that of I.P.A.and water I.P.A.整句话该怎么翻译呢? pressure pressure pressure? pressure steam vapour的区别 It comes from the vapour 对the vapour 划线 pressure screw high pressure suction pressure differential pressure pressure-sensitive pressure-sensitive pressure-relief pressure relief vent,pressure relief