Conclusion Pond-ditch water that is used as a source of drinking water in summer in rural areas should be protected against fecal contamination.

  • 结论夏季农村地区以自然沟塘水作为生活饮用水源,应注意保护,防止粪便污染。

  • 互联网摘选 2025-02-13 00:16:14

    • 相关例句
    精确
    • 模糊
    • 词首
    • 词尾
    • 词义
    • 例句