Many groups can be added by nucleophilic substitution on a diazonium salt.许多基团可通过向得自胶的重氮盐作亲核取代而加以导入.Most direct substitution of groups bound to an aromatic nucleus is limited to diazonium salts.大多数连于芳核能被直接取代的基团仅限于重氮盐....
One of them wrote to us out of the blue several years later.数年后他们中的一人突然给我们写了一封信。Her son, who left her more than thirty years ago, came out of the blue.她三十多年前离开的儿子出乎意料地回来了.The whole thing was a bolt out of the blue.这件事,整个...
Whether to have an amendatory likelihood?是否有修正的可能?The designing amendatory formulas will make the marine gearing of ship become more reasonable and safer.利用此公式计算齿面接触疲劳强度可使船用齿轮的设计更合理,更安全.Guar gum is a natural polygalactom...
“远视”的价值不可低估.FARSIGHTEDNESS is an asset whose value should not be underestimated.目的: 评价准分子激光原位角膜磨镶术(LASIK)治疗远视的效果.Objective : To evaluate the effect of LASIK hyperopia.目的探讨用准分子激光原位角膜磨镶术 ( LASIK ) 治疗远视的安全性、有效性和稳定性.Objectiv...
在这条路往下1英里处有个海军的 反 干扰测试点.The navy has an anti - jamming testing site about a mile down the road from here.受此鼓舞,当局决定扩大试点范围.This has encouraged the authorities to expand the programme.试点范围将兼顾不同类型和不同地区券商.The pilot will accou...