Three hours have passed since the discussion was begun, and I'm afraid they will protract It'still longer.这个讨论会已经开了3个小时了, 而且恐怕他们还会拖延下去的.The cat can protract its paws.猫能伸其爪.Let's not protract the debate any...
If such materials became generally available to the optics industry the payoffs from such a breakthrough would be enormous.如果这些材料能够普遍用于光学产业，那么这一突破带来的收益将非常巨大。This part of the subject is called physical optics.这部分内容叫做物理光学....
In the midst of these variations the theme was always ingeniously and excitingly retrieved.这些话题在令人应接不暇地转换着,但总是能得到鼓舞人心的巧妙的补充.It developed variations in nomenclature and in substance.它在名称上和实质上都发生了一些变化.Regular Patterns of V...