livelihood， living， subsistence， sustenance， maintenance， support， keep

livelihood
[5laivlihud]
n.
生计, 谋生

livelihood
live.li.hood
AHD:[lºv“l¶-h‹d”]
D.J.[6laivli87hud]
K.K.[6la!vli7h&d]
n.（名词）
Means of support; subsistence.
生计：维持生活的手段；生计

Middle English livelyhed
中古英语 livelyhed
alteration  influenced by liflihed [energy, vigor]  from lifli [lively]
受 liflihed的影响 [能量，活力]  源自 lifli [活泼的]
of livelode
livelode的变化
from Old English lº³d}
源自 古英语 lº³d}
lºf [life] * see life
lºf [生命] *参见 life
l³d [course] * see leit-
l³d [过程] *参见 leit-

livelihood， living， subsistence， sustenance， maintenance， support， keep
These nouns denote the means needed to provide the necessities of life.
这些名词表示用于提供生活需求的种种手段。
Livelihood  and living  are often interchangeable,  but livelihood  may specify the occupation by means of which one earns an income:  
Livelihood  和living 常可互换， 但livelihood 可指某人凭以赚取收入的职业：
Painting is her livelihood.
画画是她谋生的职业。
He earns a precarious living as a window washer.
他靠做擦窗工维持着朝不保夕的生活。
Subsistence  is sometimes equivalent to living:  
Subsistance  有时相当于living：
“The principal part of our subsistence was to be had by our guns” (Daniel Defoe). Very often, however, it suggests resources barely sufficient to support life:
“大部分生活所需都靠我们的枪来获得。” （丹尼尔·狄佛）。但它也常常表示勉强足够维持生活的资源：
“They [the Pilgrims]  fell upon an ungenial climate . . . that called out  [their]  best energies . . . to get a mere subsistence out of the soil”  (Ulysses S. Grant).
“他们［清教徒们］ 正赶上恶劣的天气…迫使 ［他们］ 使出所有力气……才能从土地上得到刚够维持生计的那点收成。”  （尤利西斯S·格兰特）。
Sustenance  applies to what is necessary to sustain life and especially to the food needed for health and comfort:
Sustenance  指维持生命所需的东西，尤指健康和舒适所需的食物：
The urban homeless are often in desperate need of sustenance.
城市里无家可归的人极其需要食物来维持生命。
Maintenance, support,  and keep  are usually reckoned as the equivalent in money of what is needed to supply necessities such as food, lodging, and clothing:  
Maintenance, supprot  和keep 常被看作是提供食物、住宿和衣物等生活必需品所需的钱：
Both parents contribute to the maintenance of their children.
双方父母都给孩子们提供生活费用。
He lives in an opulent apartment but has no visible means of support.
他住在一间豪华公寓里，但看上去没有任何经济来源。
“Long before they reached their teens they were earning their keep” (J.M. Barrie).
“当他们长到远不到青少年的时候，就在赚钱维持生活了” （J．M．巴里）。
Support  also applies to one that provides the necessaries, means, or funds to sustain others:
Support  也用于表示维持他人生活的必须品、手段或资金：
Her earnings are the only support of her aged parents.
她年迈的父母仅仅靠他的收入来维持生活