你即將離開本站

並前往https://www.usgs.gov/special-topic/water-science-school/science/hardness-water

Hardness of Water - USGS.gov

Hard water is high in dissolved minerals, largely calcium and magnesium. You may have felt the effects of hard water, literally, the last time you washed ...

確定！ 回上一頁

查詢 「Hard」的人也找了：

  1. hard用法
    2.
  2. harder中文
    3.
  3. hard名詞
    4.
  4. hard副詞
    5.
  5. Work hard
    6.
  6. hardest中文
    7.
  7. hard造句
    8.
  8. How hard it is 意味
    9.