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| 11. | a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal. |
| 一种质地柔软的银白色韧性金属元素（常温时为液体），是最具正电性与碱性的金属。 |
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| 12. | Light metals( aluminum and aluminum alloys, zinc and the like), on the other hand, are vigorously attacked by both acids and strong alkalis, so they require cleaning products that are only mildly alkaline, while acids must not be used at all. |
| 另一方面，酸和强碱都会剧烈腐蚀轻金属（和铝合金、等等）因此这类物品的清洁产品只能是弱碱性的，且绝不能用酸。 |
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| 13. | Alkali-proof paper: Paper with a high degree of resistance to alkali, used for wrapping and packaging of alkaline materials, such as soaps, adhesives, etc. |
| 耐碱纸：具有高度抗碱性的纸。用作包裹和包装碱性物体如肥皂（枧），胶粘剂等等。 |
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| 14. | "Addition of a fourth hydrogen with an accompanying positive charge on the nitrogen atom results in a quaternary amine. Naturally occurring amines include alkaloids, present in certain plants; some neurotransmitters, including dopamine and epinephrine; and histamine." |
| 胺类化合物是碱性的，但其碱性强度变化相当大。天然存在的胺类化合物包括某些植物中存在的生物碱；有些神经介质则包括了多巴胺、肾上腺素；及组织胺。 |
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| 15. | A blue or green powder consisting of basic cupric acetate used as a paint pigment and fungicide. |
| 醋酸铜由碱性的醋酸铜构成的一种蓝色或绿色粉末，用作颜料和杀真菌剂 |
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| 16. | The coagulating bath contains sulfuric acid, mainly to neutralize the alkali viscose solution, and salts which are principally sodium sulfate and a very small amount of zinc sulfate which aids in the precipitation process. |
| 凝固浴中含有硫酸,主要用来中和碱性的粘胶溶液,其主要成分为硫酸钠的盐类以及凝固过程中加入的少量硫酸锌。 |
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| 17. | "More broadly, ammonium hydroxide (see ammonia) and soluble hydroxides of the alkaline earth metals are also called alkalies. Strong bases that turn litmus paper blue, they react with acids to yield salts, are caustic, and in concentrated form corrode tissues." |
| 碱是强碱性的，会使红石蕊试纸变蓝色；它们与酸作用成为中性盐；它们是苛性的，其浓缩物可腐蚀有机组织。 |
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| 18. | The ranchers used water out of open creek holes that was sometimes alkaline and fouled up by stock |
| 牧场工人们用的水是从露天的小河坑中流出的，有时是碱性的，且被牲畜弄脏了的。 |
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| 19. | A measure of the acidity or alkalinity of a solution, numerically equal to7for neutral solutions, increasing with increasing alkalinity and decreasing with increasing acidity.The pH scale commonly in use ranges from0to14. |
| 酸碱度溶液酸性或碱性的度量，数值等于7的为中性溶液，数值增大表示碱性增大，数值减小表示酸性的增大。PH值范围一般在0到14之间 |
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