一些小东西在帐篷四周的草丛里窸窸窣窣地动着。Small things stirred in the grass around the tent.一条蛇盘在草丛里a snake coiled up in the grass地面上稀疏地覆盖草丛.The ground was sparsely covered with grass....
In this thesis a technique of testing aspheric is discussed.本文研究了实时测量非球面的技术.Aspheric optical parts manufacturing is an acknowledged difficulty and it is uneconomical.非球面光学零件加工是当前国内外公认的难题.The trend of intraocular lens des...