ephemeral

adj. 朝生暮死的，生命短暂的

enviable, enviably, envious, enviously, environment, environmental, environmentalist, environmentally, environs, envisage, envision, envoy, envy, enzyme, eon, EP, epaulet, epaulette (also esp US epaulet), epee, ephemera, epic, epicentre (US epicenter), epicure, epicurean, epidemic, epidermis, epidural, epiglottal, epiglottis, epigram, epigrammatic, epilepsy, epileptic, epilogue, Epiphany, episcopal, episcopalian, episiotomy, episode, episodic,