ประโยคภาษาจีน : 中文句子 |
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qián yán 前言 mù dì 目的 zhǎng wò 掌握 huáng hé 黄河 shuǐ yuán 水源 níng xià 宁夏 huì nóng 惠农 duàn 段 wū rǎn 污染 xiàn zhuàng 现状 hé 和 mù qián 目前 zì lái shuǐ 自来水 shuǐ zhì 水质 xiàn zhuàng 现状 |
Objective:To understand the pollution of the Yellow River in HuiNong of NingXia Autonomous Prefecture and in natural water source and running water quality. |