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- Hard water which can be softened by adding sodium carbonate is called permanent hard water. 经过加入碳酸钠能被软化的硬水，称为永硬水。
- permanent hard water 永久硬水
- Soap does not lather well in hard water. 肥皂在硬水中起不了多少泡沫。
- Equal cleanness in cold, hot or hard water. 适用于冷热水与硬水：。
- But he still he is swallowing own hard water. 但是他还是自己在吞着自己的苦水。
- Can you spell “hard water” in three letters ? 谜面：你能用三个字母拼出“坚硬的水”吗？
- If a solution forms permanent lather when shaked, also when adding solution of calcium ions or magnesium ions (hard water), white solid (scum) is formed. 若一溶液在摇动时产生恒久的泡沫；当加入钙盐溶液或镁盐溶液(硬水)后，有白色的固体(浮渣)生成。
- Hard water and soft water are two different kinds of water. 硬水和软水是两种不同的水。
- It will prevent permanent hard drive defects caused by the hard drive heads contacting the surface of the drive disc. 它可以防止永久性的故障，这些故障都是由于硬盘驱动头接触了驱动盘表面造成的。
- Most hard water or lime scale removers are only acidic cleaners. 大多数水碱或水垢清除剂只是酸性清除剂而已。
- One way to counteract hard water is by using a water softener. 中和硬水的方法是使用软水剂。
- Hard water furs the kettle. 硬水使壶生水垢。
- permanently hard water 永(久)硬水
- Secondly, it has the features of low foam, hard water resisting and readily rinsing, The cleaning strength redoubles. 第二，该种洗衣服使用时泡沫低，耐硬水，有容易漂洗的特点，洗净力倍增。
- Secondly,it has the features of low foam,hard water resisting and readily rinsing,The cleaning strength redoubles. 第二，该种洗衣服使用时泡沫低，耐硬水，有容易漂洗的特点，洗净力倍增。
- Hard water has a high mineral content. Most of the dissolved minerals are either calcium or magnesium. 水之矿物质含量较高,其溶解性金属以钙及镁为主。
- Effective sequestering of metal ions, resulting in better water retention even though used in hard water processing. 对于金属离子有着良好的掩蔽作用,即使用硬水加工生产,也能产生较好的保水效果。
- Faucet: The hard water deposit of faucet, wipe with citric section can eliminate. 水龙头：水龙头的硬水沉积物，以柠檬切片擦拭便能消除。
- Nothing can assure permanent happiness. 没有什么东西能确保永久的幸福。
- I'm looking for a permanent appointment. 我正在寻找固定的工作。
