专业释义
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必需元素 - 引用次数：3 参考来源 - 灵芝硒多糖对乳腺癌MCF必需金属元素
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必需元素 - 引用次数：2 参考来源 - 化学液相法合成纳米硒必要元素
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主要部件
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必需元素必要元素
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柯林斯英汉双解大词典
essential element
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1.
N any chemical element required by an organism for healthy growth. It may be required in large amounts (macronutrient) or in very small amounts (trace element) 生命元 [biochem] → see also macronutrient, trace element
双语例句原声例句权威例句
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Design courses, then, should be an essential element in engineering curricula.
因此，设计课程应该成为工程课程的一个基本元素。
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I agree that providing more access to public parks and sports facilities is an essential element when designing a new town.
我同意提供更多的公园和体育设施是设计新城镇时必不可少的元素。
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Having a job is an essential element of well-being.
拥有一份职业是幸福的基本因素。
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I think the essential element, in my mind, that makes it a crime is the idea that they decided at some point that their lives were more important than his, and that, I mean, that's kind of the basis for really any crime.
就我的认知，我觉得最重要的一点，之所以说他们构成犯罪,是他们认为，某种程度上，自己命比派克更重要，而这正是一切犯罪的动机。
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