degree of hardness of water
... total hardness of water 水总硬度 residual hardness of water 水的残留硬度 degree of hardness of water 水硬度 ...
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degree of hardness of water
水的硬度
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Because the changing of source water, obvious variety of total degree hardness index about the new source water caused the difference on residents' taste.
结果显示因供水水源的更换，新供水系统总硬度指标显著变化，导致口感差异；
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