双语例句原声例句
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讨论分析了现行教材中关于单质标准生成焓的规定，提出了较严谨的定义；
Standard enthalpies of formation of simple substances have been discussed in current textbooks. A more exact definition has been proposed.
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实际上，我们对二重积分的定义并不严谨，那应该怎样严格地定义它呢？
OK, so actually, how do we define it, that's not really much of a definition yet.
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这一定义覆盖了我们可能遇到的大多数形状，但形状也并非总是严谨的实体。
This definition covers the majority of shapes we're likely to encounter, but shapes are not always discreet entities.
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These invisible, vague things can never form the basis of a serious science.
这些不可见，定义模糊的东西,不能被划入严谨的科学范畴里。
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