recharge trenches的用法和樣例：
例句
- Students also helped dig trenches for the installation of white PVC pipe, though villagers are doing most of the digging.
學生們也幫忙挖溝渠來鋪設安裝白色的聚氯乙烯管子，雖然大部分的挖掘工作是村民在做。 - There, in the holy trenches, he will be shown graduate students with serious sunburn working the earth with dental picks and dustpans.
在那些神聖的溝渠里，人們會給他看被太陽晒黑的研究生們用微型鋤頭和畚箕處理泥土。
