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请输入英文单字，中文词皆可：

widening    音标拼音: [w'ɑɪdənɪŋ]
横轧宽展

横轧宽展

widening
拓展

widening
加宽

widening
n 1: an increase in width [synonym: {widening}, {broadening}] [ant:
{narrowing}]
2: a part of a road that has been widened to allow cars to pass
or park [synonym: {turnout}, {widening}]
3: the act of making something wider [synonym: {widening},
{broadening}] [ant: {narrowing}]

Widen \Wid"en\, v. t. [imp. & p. p. {Widened}; p. pr. & vb. n.
{Widening}.]
To make wide or wider; to extend in breadth; to increase the
width of; as, to widen a field; to widen a breach; to widen a
stocking.
[1913 Webster]

66 Moby Thesaurus words for "widening":
access, accession, accretion, accrual, accruement, accumulation,
addition, adjunct, advance, aggrandizement, ampliation,
amplification, appreciation, ascent, augmentation, ballooning,
bloating, boom, boost, broadening, buildup, crescendo, deployment,
development, dispersion, edema, elevation, enlargement, expansion,
extension, fanning out, flare, flood, gain, greatening, growth,
gush, hike, hiking, increase, increment, inflation, jump, leap,
magnification, mounting, multiplication, productiveness,
proliferation, raise, raising, rise, snowballing, splay, spread,
spreading, surge, swelling, tumescence, up, upping, upsurge,
upswing, uptrend, upturn, waxing


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  • Hard water - Wikipedia
    The permanent hardness of water is determined by the water's concentration of cations with charges greater than or equal to 2+ Usually, the cations have a charge of 2+, i e , they are divalent
  • Water Hardness Scale: GPG, mmol L, PPM Chart
    The internationally recognized water hardness scale recognizes 4 water hardness classes; from soft, moderately hard, hard, to very hard By definition, water hardness is the total sum of molar concentrations of calcium ions (Ca 2+) and magnesium ions (Mg 2+)
  • Hardness of Water | U. S. Geological Survey - USGS. gov
    In scientific terms, water hardness is generally the amount of dissolved calcium and magnesium in water But in layman's terms, you may notice water hardness when your hands still feel slimy after washing with soap and water, or when your drinking glasses at home become less than crystal clear
  • Water Hardness Scale: PPM, GPG, mmol L (+ Chart) 2026
    Water hardness is typically categorized into several levels, ranging from soft to very hard water The most common scale for water hardness is measure in grains per gallon (GPG) or parts per million (PPM) of calcium carbonate (CaCO3) equivalent
  • What Causes Hard Water and Is It Safe to Drink?
    Hard water forms when minerals dissolve into groundwater Learn what’s actually in it, how it affects your home and body, and whether it’s safe to drink
  • Water Hardness Map by Zip Code | Check Your Area | Crystal Quest
    Enter your zip code to instantly see your local water hardness level in GPG and PPM, plus get personalized treatment recommendations Find your local water hardness level in seconds using our interactive map No account required
  • What’s the Ideal Water Hardness Level? [2025 Guide] - QWL
    Water hardness is measured in milligrams per liter (mg L), parts per million (ppm) or grains per gallon (GPG) The most commonly used measurement is grains per gallon (GPG), but conversion is easy One part per million is equal to 1 mg L, and one grain is equal to 17 1 parts per million
  • How is Water Hardness Measured? A Comprehensive Guide
    Water hardness refers to the amount of calcium and magnesium ions dissolved in water These minerals are common in groundwater that has come into contact with rocks such as limestone and chalk The levels of these minerals can vary greatly depending on the source of the water
  • Water Hardness - an overview | ScienceDirect Topics
    Water hardness is the total calcium and magnesium ion concentration in a water sample and is expressed as the concentration of calcium carbonate Temporary hardness is that part of the total hardness that disappears on boiling
  • Water Hardness and How is it Measured? - Environment Buddy
    Water Hardness is referred to as a sum of divalent metallic ions present in the water The major contributors to the hardness of water are magnesium and calcium





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