... 1 粉煤灰 fly ash 2 对比样品 contrast sample 3 试验样品 testing sample ...
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Draw by sample contrast 按采样对比度
·2,447,543篇论文数据，部分数据来源于NoteExpress
In contrast, a sample of corporations sent 60% of its messages by phone, 9% by text, and 19% by email.
FORBES: 5 Lessons From Hurricane Sandy For Emergency Preparedness
By contrast, if the sample comes back pure, researchers can then focus on identifying clues as to where the organics came from.
MSN: New Mars rover hunts for life by 'cooking' rocks
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