transitory
adjective formal uk/ˈtræn.zɪ.tər.i/ us/ˈtræn.sə.tɔːr.i/
短暂的，转瞬即逝的
lasting for only a short time
the transitory nature of life 生命转瞬即逝的本质
Synonyms: brief (SHORT IN TIME)ephemeralevanescent fleetingfugitive (TEMPORARY) momentarypassing short-livedtransient