| 31. | Dependence is marked first by an increased tolerance, with more and more of the substance required to produce the desired effect, and then by the appearance of unpleasant withdrawal symptoms when the substance is discontinued. |
| 对药品的依赖性首先表现为不断增长的耐药量，要产生想得到的效果所 需要的药品剂量越来越大，然后表现为当停止用药后，令人不快的停药 症状的出现。
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| 32. | The substance is soluble in alcohol. |
| 这物质能溶解于酒精。
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| 33. | These two chemicals interact with each other at a certain temperature to produce a substance which could cause an explosion. |
| 这两种化学物品在一定的气温下相互作用,产生出一种会引起爆炸的物质。
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| 34. | This substance contains poisonous gases. |
| 这种物质含有有毒气体。
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| 35. | a substance that is irritant to sensitive skins |
| 对敏感的皮肤有刺激性的物质
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| 36. | a narcotic effect, substance |
| 麻醉的作用, 物质
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| 37. | a nutritive substance |
| 营养物
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| 38. | a gelatinous substance |
| 胶状物质
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| 39. | a glutinous substance |
| 胶性物质
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| 40. | a granular substance |
| 粒状物质
|