The urban homeless are often in desperate need of sustenance.
城市里无家可归的人极其需要

维持生命。

;营养;养料
, 滋养
;
, 生
, 维生之道;
;
;
给量;The urban homeless are often in desperate need of sustenance.
城市里无家可归的人极其需要

维持生命。
He gave money for the sustenance of a poor family.
他把钱给一穷人家维持生
。
The earth brings forth large crops every year for the sustenance of man and beast.
大地每年生产出大量的农作
,供人畜
用。
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