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知道你的饮用水的来源——河流,湖泊或是你家的含水土层。
Know the source of your drinking water-the river, lake, or aquifer that supplies your home.
youdao
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知道你的饮用水的来源——河流,湖泊或是你家的含水土层。
Know the source of your drinking water-the river, lake, or aquifer that supplies your home.
youdao