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考查原始材料首先要了解它的意义：用公式解答问题。
Survey the material first to get a sense of it: formulate some questions.
youdao
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提出了药芯焊中合金元素总原始含量的计算公式。
The formula of element original content in the cored wire has been proposed.
youdao
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提出了药芯焊中合金元素总原始含量的计算公式。
The formula of element original content in the cored wire has been proposed.
youdao