The light is resolved by prisms, gratings, or by an interferometer.光线用棱镜 、 光栅或干涉仪分解.Many of the roofs were so full of holes that they looked like gratings.许多屋顶千穿百孔,象筛子一样.All gratings shall lie flat with no tendency to ro...
The escort and the universal watchfulness had completely isolated him.护送和普遍一致的监视曾经使他完全孤立.A due watchfulness on the movements of the enemy was maintained.他们对敌人的行动还是相当警惕的.These are not the only points to which you look for...