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1.向……之下:Many torrential rivers flow down high mountains and run across wide ...down with打倒：“Down with the imperialists! ...
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In August, before the semester began, I went to Beijing to visit some friends that had stopped in C...
《语数外学习(高中版高一年级)》 2007年06期 关键词: 收藏
阐述了白底向上设计和白顶向下设计方法的区别。通过概念设计、产品布局设计、骨架设计、零件设计的设计流程完成减速器的白顶向下设计。实践证明，Top-down的设计思想和方法支持并行T程和协同设计，提高设计...
《宁波职业技术学院学报》 2011年2期 关键词: "白顶向下","布局","减速器" 收藏
Enterovirus A71(EV-A71) is the major pathogen responsible for the severe hand, foot and mouth diseas...
《Virologica Sinica》 2020年01期 关键词: "" 收藏
A tunable ultrafast intensity-rotating optical field is generated by overlapping a pair of 20Hz, 800...
《High Power Laser Science and Engineering》 2020年01期 关键词: "" 收藏
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