sustenance
/ˈsʌstɪnəns/noun
mass noun
1- food and drink regarded as a source of strength; nourishment生活资料; 食物; 营养：
poor rural economies turned to potatoes for sustenance.
农村经济贫困, 于是把土豆作为食物。
1.1
- the maintaining of someone or something in life or existence支撑物; 维持物; 生计：
he kept two or three cows for the sustenance of his family
他养了两三头奶牛维持家里的生计
the sustenance of parliamentary democracy.
议会民主政治的支撑。
词源
Middle English: from Old French soustenance, from the verb soustenir （see SUSTAIN）.