...g Saanen Dairy Goat;universal expression vector [gap=389]关键词】 β酪蛋白基因5′侧序列;西农萨能奶山羊;通用表达载体 ...
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数学语言作为一种表达科学思想的通用语言和数学思维的最佳载体,它不仅是数学的主要教学手段,而且也是数学的重要的教学艺术。
As a general language to express scientific thought and the best carrier of maths thought, maths language is not only the main teaching method of maths, but also the important teaching art of it.
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