名詞 lifeline:

1. a crease on the palm; its length is said by palmists to indicate how long you will live
   同義詞：line of life, life line
2. support that enables people to survive or to continue doing something (often by providing an essential connection)
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

1. I was getting deeper in debt but my father-in-law threw me a lifeline and lent some money until my financial situation improved.
   我欠了很多債，是我的岳父給我了幫助，他借給我一些錢，幫助我擺脫了經(jīng)濟困境。
2. Public transport is a lifeline for many rural communities.
   公共交通對許多農(nóng)村居民來說是不可或缺的。

life.line

n.（名詞）

An anchored line thrown as a support to someone falling or drowning.
救生索：一條一端固定的繩索，扔給墜落或溺水的人作為支撐物
Nautical A line shot to a ship in distress.
【航海】 救生索：拋向遇難船只的繩索
A line used to raise and lower deep-sea divers.
升降索：用來提升或放低深海潛水員的繩索

A means or route by which necessary supplies are transported.
重要的交通線：必需物資運輸?shù)姆椒ɑ蚵肪€
One that is or is regarded as a source of salvation in a crisis.
救星：是或被認為是在危機中拯救別人的人
A diagonal line crossing the palm of the hand and believed to indicate the length and major events of one`s life.
生命線：穿過手掌的一條斜紋，被認為能指示某人的壽命和生活中的主要事件