| 1. | Litmus paper can be used as an indicator of the presence of acid in a solution. |
| 石蕊试纸可用以测试溶液是否含酸。
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| 2. | Acid irritates the stomach lining. |
| 酸能刺激胃黏膜。
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| 3. | Acid had pitted the surface of the silver. |
| 酸把银器的表面腐蚀了。
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| 4. | Acid has corroded the iron (away). |
| 酸把铁腐蚀了。
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| 5. | Vinegar contains acetic acid . |
| 醋中含有醋酸。
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| 6. | The acid test of a good driver is whether he remains calm in an emergency. |
| 衡量驾驶员水平的决定性考验,就是看他在紧急关头能否保持镇静。
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| 7. | A lemon is an acid fruit. |
| 柠檬是一种酸的水果。
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| 8. | Vinegar has an acid taste. |
| 醋有酸味。
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| 9. | His remarks were rather acid . |
| 他的话有些尖酸刻薄。
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| 10. | Acid eats into metals. |
| 酸会腐蚀金属。
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