The liquids are probably a combination of methane and ethane, given the conditions on Titan and the abundance of methane and ethane gases and clouds in Titan's atmosphere.
乙烷气体Ethane gas gas 英[gæs] 美[ɡæs] n. 气体; 汽油; [矿业] 瓦斯; 毒气; vt. 加油; 毒(死); vi. 加油; 放出气体; 空谈; [例句]Coal is actually cheaper than gas煤实际上比煤气便宜。[其他] 第三人称单数:gasses 复数:gases 现在分词:gassing过去式:gassed 过去分词:gassed