life·line /ˈlaɪfˌlaɪn/
救生索,生命線
lifeline
n 1: a crease on the palm; its length is said by palmists to
indicate how long you will live [syn: line of life, life
line]
2: support that enables people to survive or to continue doing
something (often by providing an essential connection);
"the airlift provided a lifeline for Berlin"; "she offered
me a lifeline in my time of grief"
3: line that raises or lowers a deep-sea diver
4: line thrown from a vessel that people can cling to in order
to save themselves from drowning