习惯用语F-of Youth1.青春泉, 长生不老泉(传说此泉在美洲和西印度群岛, 饮此泉水有病治病, 无病可返老还童)poison the fountain of trust1.损坏信用特殊用法air fountain1.喷气嘴, 喷气器, 气泉eruptive fountain1.喷泉lava fountain1.【地质】熔岩喷涌