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A chemical compound called a neurotransmitter, released by one neuron, travels across the small intercellular gap, or synapse, to interact with another cell.
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一神经原放出的一种叫神经原传达体的化学混合物，通过小小的细胞间隙（神经键），与另一细胞交互作用。 |
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A chemical constituent (element or compound) of an alloy, which may be used to specify its composition.
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合金的任一组成（可以是元素或化合物），可以被用于区分其构成成分。 |
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A chemical derived from petroleum or natural gas.
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石油化学制品从石油或天然气中提炼出的化学产品 |
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A chemical imbalance of some kind that reduces such inhibition—for example, by blocking the action of an inhibitory neurotransmitter or failing to produce an inhibitor—would also cause activity in one area to elicit activity in a neighbor.
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如果有某种化学上的不平衡降低了这种抑制，好比说阻断了某个抑制性神经传递物的作用，或是不再制造该抑制性物质，就有可能使某区的活性引发其相邻脑区的活性。 |
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A chemical or product, such as cellulose, derived from plants.
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农产品来源于植物中的化学品或产品，如纤维素 |
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A chemical reaction occurs so that the interference pattern, or hologram, is permanently recorded into the medium.
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一个化学反应随即产生，参考图样（全息图）这样就可以永久性地被记录到感光介质之中。 |
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A chemical substance used to destroy or inhibit the growth of plants, especially weeds.
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灭草剂用来摧毁或抑制植物，尤指杂草的生长的化学物质 |
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A chemical that makes sour, acidic food taste wonderfully sweet may soon be flowing from a genetically altered lettuce created by scientists in Japan.
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也许不用多久，一种能让酸味的食物尝起来甘甜无比的化学物质就能从日本科学家创造出的一种基因改良的生菜中源源不断涌流而出。 |
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A chemical thermodynamic model was constructed based on the analysis of the combustion process in diesel engines.
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摘要对柴油发动机的燃烧过程进行分析，建立燃烧的热化学动力学模型。 |
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A chemical, such as a hormone, a fungicide, or an insecticide, that improves the production of crops.
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农药，农用化学品用来增加作物产量的化学品，如激素、杀菌剂、杀虫剂 |
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A chemist can isolate the oxygen from the hydrogen in water.
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一个化学家能把水中的氧和氢分解开。（其实我们也能做，就用电解水器就行了。） |
