保护上游水源不仅是环保问题,也关系到整座城市的公共安全。Bǎohù shàngyóu shuǐyuán bùjǐn shì huánbǎo wèntí, yě guānxì dào zhěng zuò chéngshì de gōnggòng ānquán.Protecting upstream water sources is not only an environmental issue; it also concerns the public safety of the whole city.
这条河是附近几个村庄唯一的饮用水源。Zhè tiáo hé shì fùjìn jǐ ge cūnzhuāng wéiyī de yǐnyòng shuǐyuán.This river is the only drinking-water source for the several nearby villages.
工厂不能把废水排进水源附近,这会污染整个地区。Gōngchǎng bùnéng bǎ fèishuǐ pái jìn shuǐyuán fùjìn, zhè huì wūrǎn zhěnggè dìqū.Factories must not discharge wastewater near the water source; it would pollute the whole area.