还原物质

reducing substances的用法和样例：

例句

Moreover,the microorganism which was brought by permeable surface water degraded the primary kerogen in sedimantary rocks and could produce reducing matters.同时，地表下渗的大气降水携带了细菌类微生物，对原生有机质进行生物降解，并生成硫化氢类还原物质。

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automatic tracking loop