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TOEFL IELTS BNC: 1597 COCA: 3238
*acid¹
/ˈæsɪd ||; ˈæsɪd/noun [C,U] (in chemistry) a liquid substance that can dissolve metal and may burn your skin or clothes. Acids have a pH value of less than 7. (化学)酸: sulphuric acid 硫酸 ☞Look at alkali and base. 参看 alkalibase ☞picture at pHpH插图
acid²
/ˈæsɪd ||; ˈæsɪd/adj
1 (used about a fruit, etc) with a sour taste (指水果等)酸的,酸味的
2 (also acidic /əˈsɪdɪk ||; əˈsɪdɪk/) containing an acid 含酸的;酸性的: an acid solution 酸性溶液 [OPP]Look at alkaline. 参看 alkaline ☞picture at pHpH插图

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