当然, 坐标系 ( x, y, z ) 轴向的选择是任意的.The choice of orientation of the ( x, y, z ) coordinate system is, of course, quite arbitrary.除此之外, 具有曲线型齿线之齿轮在运转时亦不会产生轴向的推力.Moreover, a gear pair with curvilinear - tooth traces operates wi...
A Delta II rocket was launched from Cape Canaveral early this morning.今天一早，一枚“德尔塔”Ⅱ型火箭在卡纳维拉尔角发射升空。He was appointed Apostolic Administrator of Minsk by Pope John Paul II.他被教皇约翰·保罗二世任命为明斯克区的宗座署理。You can import files from M...
She'd been fluttering about in the kitchen.她一直在厨房里忙前忙后。It was autumn, and leaves were fluttering down in the light wind.现在是秋天, 树叶在微风中飘落下来.Flags were fluttering in the wind.旗帜在风中飘扬....
For some inexplicable reason she was attracted to Patrick.因为某些无法解释的原因，她被帕特里克所吸引。His behaviour was extraordinary and inexplicable.他的行为不同寻常，让人费解。For some inexplicable reason he gave up a fantastic job.由于某种莫名其妙的原因，他放弃了一份很不错...
She had an affected air and a disdainful look.她举止做作，神情倨傲。He is highly disdainful of anything to do with the literary establishment.他对任何与文学界权威沾边的事都嗤之以鼻。Edgar cast a disdainful look at his twin.埃德加朝他的双胞胎兄弟投去鄙夷的目光。...
The structure, the principle of work, bauxite floatation of BF - L floatation machine were presented.本文介绍了BF -L 型浮选机的结构特点, 工作原理及铝土矿选矿的适应性研究.B factor ( BF ) in thyroid function hyperfunction sickness blood serum content a...