Life youth line走过生命的青春线
life-line system生命线系统
choreography life-line编排的生命线
life-line救生索;生命线;逃生口
life-line tester验电测试
LIFE-LINE MORTGAGE生命线贷款
fireproof life-line耐火安全索
life expectation line throwing gun救生索发射枪
life-line systems engineering生命线系统工程
N-COUNT（可数名词） A lifeline is something that enables an organization or group to survive or to continue with an activity. 生命线
Information about the job market can be a lifeline for those who are out of work.
有关就业市场的信息可能就是失业者的生命线。