例句與造句

1. This paper mainly aims at the strategic demands for large - aperture lightweight mirror proposed by high - tech development . its main research contents are : select material blank for lightweight mirror according to physical and chemical properties of optical glass ; analyze and calculate the deformation quantity of the mirror with finite element method ; design and optimize mirror body structure of 400 lightweight plane mirror and 450 lightweight spherical mirror , analyze glass cutting principle , design specisl - use grinding wheel structure , select reasonable technological parameters to implement the processing of weight reduction holes on 400 plane mirror ; analyze etching mechanism of hydrofluoric acid , look for the technological parameters such as the optimal acid concentration and etching time etc . ; eliminate the stress of weight reduction holes and micro - cracks on 400 lightweight plane mirror ; discuss the processing principle and
   本論文的研究主要是瞄準(zhǔn)國家高技術(shù)對(duì)大口徑輕型鏡的戰(zhàn)略需求而開展的。主要研究內(nèi)容是：根據(jù)光學(xué)玻璃的物理與化學(xué)性能，選擇輕型鏡坯材料；用有限元法對(duì)鏡子的變形進(jìn)行分析、計(jì)算，找出變形規(guī)律，優(yōu)化設(shè)計(jì)400mm輕型平面鏡、 450mm輕型球面鏡鏡體結(jié)構(gòu)；分析玻璃切削原理，設(shè)計(jì)專用磨輪結(jié)構(gòu)，選擇合理工藝技術(shù)參數(shù)，完成400mm平面鏡輕量化減重孔的加工；分析氫氟酸腐蝕光學(xué)玻璃機(jī)理，尋找最佳酸濃度、腐蝕作用時(shí)間等工藝參數(shù)，實(shí)現(xiàn)400mm平面鏡減重孔應(yīng)力與微裂紋的消除；討論分離器加工原理和工藝技術(shù)特點(diǎn)，完成400mm平面輕型鏡面形加工。
2. It's difficult to find lightweight mirror in a sentence. 用lightweight mirror造句挺難的