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Scientists and engineers tend to express their ideas in the form of equations ___.But for the rest of us, a qualitative grasp of scientific concepts is sufficient,and this can be conveyed by words and diagrams , without the use of equations.
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答案：
they need to know the precise values of quantities
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譯文:科學家和工程師傾向于用公式闡述觀點，因為他們需要知道量的精確值。但對我們其余的人來說，對科學概念有個質的認識就已經足夠了，這可以利用文字和圖表來表述，大可不必用公式。
