They are acrylaldehyde hydration, ethylene oxide formylation and biological zymolysis methods.即丙烯醛水合法, 环氧乙烷甲酰化法,生物发酵法.Secondly, take p - nitrophenol as the raw material, studing the effect of Duff formylation reaction.其次...
He found that his extremities grew cold.他发现手脚变冷了。Exercise is very important as it keeps the circulation moving and warms the extremities.锻炼非常重要，它可以促进血液循环，保持手脚温暖。In the past, the region had been protected by its forbiddin...