Object : To observe the oxygen derived free radicals scavenging of diterpenoid tanshinones by pyrogallol autoxidation systems.目的: 探讨丹参二萜醌对邻苯三酚自氧化反应产生的氧自由基的作用.Reaction mechanism of liquid phase autoxidation of O - nitroto...
Television has irreversibly changed our perception of the Royal Family.电视不可逆转地改变了我们对皇室的印象。Human perception is highly imperfect and by definition subjective.人的感知具有高度缺陷,而且天性主观。our perception of reality我们对现实的认识...
The Ball was attended by the cream of Hollywood society.好莱坞的大牌影星们出席了那个舞会。They attended college together at the University of Pennsylvania.他们一起就读于宾夕法尼亚大学。Jack had attended these meetings as a matter of routine for years.数...
The extraction mechanism of palladium in chloride system by di ( 1 - methyl heptyl ) acetamide ( N _ ( 503 )) has been studied.本文研究了N, N二 甲庚基乙酰胺 ( N_ ( s03 ) )从氯化物体系中萃取钯的机理....
感觉上我们好像已从天底走到了天顶.It felt as if we had traveled from nadir to zenith.天底天球上,在观测者垂直向下的一点, 与天顶完全相对.A point on the celestial sphere directly below the observer, diametrically opposite the zenith....
Into her nineties, her thinking remained acute and her character forceful.虽已年届九旬,她依然头脑敏锐,个性很强。These trends only got worse as we moved into the nineties.我们步入20世纪90年代时,这些潮流变得更糟了。By this time she was in her nineties and nee...