extra-pure grade 超纯级
Phthalimide extra pure 邻苯二甲酰亚胺
extra pure reagent 超纯试剂
If the theory was correct, breathing air with extra carbon dioxide should have triggered yawning, while breathing pure oxygen should have suppressed yawning.
如果这个理论是正确的，那么吸入含有额外二氧化碳的空气应该会引起打哈欠，而吸入纯氧应该可以抑制打哈欠。
An original modern aesthetic realism, its true and pure, without any extra polish.
现代写实主义的一种原始美感，它真实而单纯，无需任何多余的雕琢。
Based on the features of pure cotton of extra high count fabric, this paper analyses the difficulties in weaving process and puts forward some technical measures in practice.
根据纯棉特高支织物的特点，分析了织造工艺的难点，提出了在生产实践中应采取的技术措施。
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