其金属取代物能和环戊酮顺利地反应得到40.Its metallation and addition to cyclopentanone proceeded well to 40.以单质碘为催化剂合成了环戊酮乙二缩酮.Cyclopentanone ethylene ketal was synthesized with I _ 2 as catalyst.比较研究了三种含苄叉环戊酮基团的新型香豆素类光敏染料.Absorption spect...
你这样臆断是错了.You were mistaken in assuming it.这份报告建立在谣言、臆断和含沙射影的基础之上。The report was based on rumours, speculation, and innuendo.她说报纸上的报道毫无根据,纯属臆断.She dismissed the newspaper reports as pure speculation....
Kuwaiti prisoners have their ears nailed to plank of wood.科威特战俘的耳朵则被钉在厚厚的木板上.We use a plank to cross the ditch.我们用一块木板过了沟。Birdbath, mirror and floodlight belong to bathroom furniture to divide furniture door plank beside...
从证据看,我敢断定你错了.From the evidence I must conclude that you are wrong.兔子还是找到办法进去了。我敢断定，有些兔子甚至已经用上了咬断金属的办法。Rabbits still manage to find a way in. I am sure that some have even taken to gnawing through the metal.这个星期那个蚤窝演什么戏? ...