硬水软化 /yìngshuǐ ruǎnhuà/ angolul

water softening▼(removal of calcium and magnesium ions from water)
noun
[UK: ˈwɔː.tə(r) ˈsɒf.n̩.ɪŋ] [US: ˈwɒ.tər ˈsɒf.n̩.ɪŋ]