P - methoxybenzeneacetonitrile was prepared in 34.8 % yield starting from anisole, via chloromethylation, cyanogenation and fractional distillation.以苯甲醚为原料,经过氯甲基化, 氰化反应后, 通过精馏获得对甲氧基苯乙腈,总收率为34.8%....
她一走出众人的视线就开始飞奔起来。The moment she was out of sight she broke into a run.我们沿着艾维格大街一路飞奔到汽车那儿。We belted down Iveagh Parade to where the motor was.在他们生病的时候她飞奔至他们身边。She flew to their bedsides when they were ill....
患了视物模糊症,阅读就更加困难了.Clouded vision can make it more difficult to read.某些视觉先兆表现为奇异生动的视物变性.Some of the visual distortions can be exotic and bizarre.然后可能视物 、 说话 、 吞咽或移动手、脚出现困难.Later, there may be difficulties with vision, spee...
At 420mph the windscreen disintegrated.挡风玻璃在时速420英里时破碎。The box was so old ; it just disintegrated when I picked it up.那箱子太破旧了,我刚一提就散了.The box was so old;it just disintegrated when I picked it up.那箱子太破旧了, 我刚一提就散了。The rock...