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simple machinery
简单机械
人类在劳动实践中最早创造的结构简单的机械,包括杠杆、滑轮、斜面、螺旋、尖劈等。
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recombination coefficient
recombination continuum
recombination cross-section
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Recommendation(Bin-Gong) Candidates
Recommendation Concerning the Most Effective Means of Rendering Museums Accessible to Everyone
Recommendation Concerning the Protection and Promotion of Museums and Collections, Their Diversity and Their Role in Society
Recommendation concerning the Status of Teachers
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