life at在 ... 的生活lifen.一生；生命；生活；人生lifesaving station救护站Life extended rate生命延长率Life is a bus trip生活就是一场公交车旅行life time function寿命函数lifesaving air bed救生气垫life-saving ring救生圈life toxicity test终生毒性试验life cycle costing寿命周期价格,生命周期成本法,寿命周期成本life re-creation生命重造life-time income终生收入