This paper discussed three methods of producting vinyl etherspreparation from acetylene, dehydrohalogenation and acetals.论述了乙烯基醚类化合物的三种主要制备方法乙炔法 、 脱卤化氢法和缩醛热分解法.Allene is an isomer of methyl acetylene.丙二烯是甲基乙炔的一种异构体.In th...
Allene is an isomer of methyl acetylene.丙二烯是甲基乙炔的一种异构体.In the darkness, the machine gun spat a vindictive white light like an acetylene torch.机枪在黑暗中吐出一道凶厉的白光,活象一支喷火的乙炔吹管.In the high - pressure system both oxygen and acet...
Flotation is used for Florida and Kola rock.浮选操作法用于佛罗里达磷矿和科拉磷矿.Gotu kola is often used to increase mental function and performance.可拉树常用作增强心智功能及体能.Gotu Kola works on the pituitary gland, which regulates all hormones.可拉树有...
安妮-拜厄在普林斯顿大学的朋友们一向把她看作是典型的勤奋刻苦的好学生.Friends at Princeton University have always regarded Annie Byar as a typically accomplished student.不要让自我和贪婪妨碍清晰的思维和刻苦的工作.Don't let ego and greed inhibit clear thinking and hard wo...
The recombine of property is the main form which realizes the strategic adjustment.资产重组是实现这一战略性调整的主要形式。These atoms recombine in pairs during the night to form molecules of oxygen gas.在夜间,这些氧原子再成对地结合成氧气分子.That provides am...
I am luckier than most. I have a job.我比大部分人幸运。我有份工作。'You are a luckier, if you mean that.'“ 你比我要幸运些, 假如你是那意思的话. ”Some people are luckier in some things than others.有些人在有些事情上运气就是比别人好....
He gets vicarious thrills from watching people bungee jumping.看到别人蹦极他感到了同样的刺激.Its prime audience lies in the 17 to 24 age group, and they want instant thrills and spills.它的主要观众的年龄集中在17岁到24岁之间，而这些人喜欢极速的惊险刺激。"A cashmere sw...