洛维特是个威严的高个男人，蓄着灰白的八字胡。Lovett was a tall, commanding man with a waxed gray mustache.他端坐在那里，浑身透着王者的威严。He sat with such regal dignity.大教堂的宏大规模使人时刻领略到宗教的威严。The sheer size of the cathedral is a constant reminder of the power ...
介绍了平齿根齿侧配合英制渐开线花键计算、测量的基本公式及方法.This paper introduces calculation and measurement of BRITISH Standard Involute splines.拖到绘图页上. 拖动黄色菱形可调整中心圆 、 齿根圆和外径的大小.Drag onto the page. Drag yellow diamonds to resize hub circle, root c...
Carpel The female reproductive organ of a flowering plant.心皮:有花植物的雌性生殖器官.Plicate carpel 6 ~8, initiated in a whorl simultaneously.心皮6～8枚, 呈一轮同时发生,为对折型心皮.The browning of Yali pear appear carpel at first , and then appear ...