n.维持生计；营养；食物
He gave money for the sustenance of a poor family. 他把钱给一穷人家维持生活。
There isn't much sustenance in a cucumber. 黄瓜没有很多营养。
He has gone for a week without sustenance. 他已经一星期未吃食物了。
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。
