The definition of operator homeomorphism mapping , together with its characterizations, is given in this paper.在算子开集理论中给出了算子同胚映射的概念, 得到了算子同胚映射的若干性质....
铬镀后常常是通过磨削及研磨来达到尺寸.Frequently chromium deposits are ground or lapped to size.最普通的精加工工序是用机械的方法, 如研磨, 磨削或用磨料抛光.The most common finishing operations are mechanical, such as milling, grinding, or polishing with abrasives.成形法...
How often does your dog have puppies? ( How often does your dog give birth to puppies? )你的狗隔多久下一窝小狗?How does ability oneself give birth to second liver antibody have?乙肝抗体怎样才能自身生有?Pregnant females always give birth to twi...
In particular, the invention is concerned with amido piperazine derivatives.具体地说, 本发明涉及酰氨基哌嗪衍生物.Fmoc, Boc and Pbf were used respectively to protect α - amido, side amido and side guanidine group.对于α-氨基仍采用Fmoc保护策略, 侧链氨基用二...
It was a perfectly flavorless Ghost.它是完全无风趣的幽灵.Far from flavorless cubes, the menu selection includes such astronaut favorites as shrimp cocktail.和味同嚼蜡的方块大相径庭, 菜单中精选的食品包括宇航员最喜欢的虾仁蘸酱....