lifeline

n 1 (nautical 海) (a) line or rope for saving life such as that attached to a lifebelt, or fastened along the deck of a ship in a storm for sailors to hold on to 救生索. (b) line attached to a deep-sea diver （深海潜水员的）信号绳. 2 (fig 比喻) anything on which sb/sth depends for continued existence 生命线; 命脉: Public transport is a lifeline for many rural communities. 公共交通对许多农村居民来说是不可或缺的.

life-giving, life-guard, life-jacket, life-preserver, life-raft, life-saver, life-saving, life-size, life-size, life-sized, life-span, life-style, life-support, life-time, life-work, lifebelt (also lifebuoy), lifeboat, lifeless, lifelessly, lifelessness, lifelike, lifelong, lifer, lifestyle, lifetime, lift, lift-attendant, lift-off, ligament, ligature, light, light bulb, light industry, light meter, light pen, light up, light-coloured, light-fingered, light-headed, light-hearted, light-heartedly,