envelope

n.信封

entrap, entrapment, entreat, entreatingly, entreaty, entree, entrench (also intrench), entrenchment, entrepot, entrepreneur, entrepreneurial, entrust, entry, Entryphone, entwine, enumerate, enumeration, enunciate, enunciation, envelop, envelopment, envenom, enviable, enviably, envious, enviously, environment, environmental, environmentalist, environmentally, environs, envisage, envision, envoy, envy, enzyme, eon, EP, epaulet, epaulette (also esp US epaulet),