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n.救生索；（潜水员的）通报绳；生命线；重要的交通线 变形： 复数：lifelines 英英释义： lifeline[ 'laiflain ]n.a crease on the palm; its length is said by palmists to indicate how long you will live同义词：line of lifelife linesupport that enables people to survive or to continue doing something
