UC知道they have been used to remove arsenic from the sludge produced by gold mining operations
来源：百度知道 编辑：UC知道 时间：2024/06/06 17:03:13
翻译，produced 在句中什么意思
翻译：
它们被用来去除沉积物里面采挖金矿产生的砷。
produced by gold mining operations 是个过去分词结构，作定语修饰arsenic。produce这里是导致、使出现的意思。
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