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| 41. | "In strong heat and sunlight, only small amount of poisonous gas is released from the rubberized material |
| "在高温和强烈光照的条件下,这种塑胶材料才会发出少量有毒气体,"他说。"而且,操场通常都在户外,气体浓度不足以影响人们健康。" |
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| 42. | In many communities, factories and motor vehicles pollute the air With poisonous gas fumes that may cause |
| 有时人类毒化自身的环境，制造新的病源。在很多社区，工厂、车辆用引起肺部疾病的有毒气体污染空气。 |
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| 43. | A colorless, flammable, very poisonous gas, H3As, having an odor like garlic and used in chemical warfare |
| 砷化三氢一种无色可燃，毒性大的气体，H3As，有种类似大蒜的气味，用在化学武器中，用作固体添加剂，和用于有机合成 |
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| 44. | "Its most familiar compound is hydrogen sulfide, a poisonous gas that smells like rotten eggs. |
| 最常见的一种化合物是硫化氢,是一种具有臭鸡蛋气味的极毒气体。除了金和铂以外,所有的金属都能跟硫化合生成硫化物,许多矿物就是这种硫化物。 |
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| 45. | cars are produced and used, so the emission from their exhaust pipes contains an ever larger volume of poisonous |
| 由于与日俱增地生产和使用汽车，致使有毒气体的排放量比以往任何时候都多，这不仅污染了空气，也危害人类健康。 |
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| 46. | Carbon monoxide (CO) is a colorless, odorless, poisonous gas, slightly lighter than air, that is produced |
| 一氧化碳（CO）是一种无色无味的有毒气体，比空气稍轻，这是由燃料中的炭不能完全燃烧生成的，主要来源是内燃机，大多产生于机动车辆。 |
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| 47. | All pumps of this series are not suitable for gas containing too much oxygen or grains of dust, poisonous |
| 该泵不宜抽除含氧过高、害、爆炸性、金属有腐蚀性、真空油起化学反应，含颗粒尘埃的气体，也不能用来把气体从一个容器抽送到另一个容器作输送泵。 |
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| 48. | cars are produced and used, so the emission from their exhaust pipes contains an ever larger volume of poisonous |
| 由于与日俱增地生产和使用汽车，致使有毒气体的排放量比以往任何时候都多，这不仅污染了空气，也危害人类健康。 |
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| 49. | This is why shipping regulations require diaphragm valves on most poisonous gas cylinders. |
| 这正是为什么运输规范要求在大多数有毒气体钢瓶上使用隔膜阀的原因。阀门没有螺纹或润滑剂处在气流中，不会产生颗粒或污染气体。 |
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| 50. | infants pressed by their mothers to their bodies in the gas chambers so that they should not inhale the poisonous |
| 你们将会听到，毒气室里面的母亲怎样把幼小的婴儿紧紧抱在身上，以免他们吸进毒气，直到行凶者过来把他们活活丢进焚尸炉，或者抛进等待着他们的坟墓。 |
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