n.[U]

1. 食物，糧食；營養（品）
   We derive our sustenance from the land.

   我們從土地獲取食物。

2. 生計
3. 支持，維持，供養
   Due to the lack of food, they relied upon gruel for their sustenance.

   因為缺乏食物，他們依賴喝粥維生。

n.

1. food and drink regarded as sustaining life.
2. the sustaining of someone or something in life or existence.