life·timeBrE/ˈlaɪftaɪm/NAmE/ˈlaɪftaɪm/nounthelengthoftimethatsblivesorthatsthlasts一生;终身;有生之年;(某物的)存在期,寿命,使用期限◆Hisdiarywasnotpublishedduringhislifetime. 他的日记在他生前未曾发表过。◆alifetimeofexperience毕生的经验◆inthelifetimeofthepresentgovernment在本届政府的任期内●thechance, etc. ofaˈlifetimeawonderfulopportunity, etc. thatyouarenotlikelytogetagain终身难得的机遇;千载难逢的机会●onceinaˈlifetimeusedtodescribesthspecialthatisnotlikelytohappentoyouagain(可能)一生只有一次◆Anopportunitylikethiscomesonceinalifetime. 像这样的机会一生也许只会遇到一次。◆aonce-in-a-lifetimeexperience一生只会拥有一次的经历