To indicate the feasibility of acetic ester carboxylation process in China based on making process comparison.通过对各种生产工艺的对比,提出了醋酸甲酯羰基化工艺在我国的可行性.The accepted commercial process is based on 2, 4 - difuloroaniline, through c...
在脱氨作用中, 分子 含氨基 的部分被移去.In deamination, the nitrogen - containing amino portion of the molecules is removed.叠氮还原是向有机分子中引入氨基的重要方法.Reduction of azides is an important method to introduce amino group to organic molecules.采购产品...
The new invention ensures the beer keeps a full, frothy head.这项新发明能保证啤酒始终保持丰富的泡沫。It's been a tricky business marketing his new invention.推广他的新发明一直是件棘手的事情。You can't fault them for lack of invention.你不能因为他们缺乏创新就指...
我们进口原材料和能源，主要出口工业产品。We import raw materials and energy and export mainly in-dustrial products.取材自同一原材料意味着啤酒的口味始终如一。Taking ingredients from the same source means the beers stay the same.可开发利用的原材料供应不足。Exploitable raw mater...
He attacked the North American Free Trade Agreement ( Nafta ) and said It'should be renegotiated.他大力抨击《北美自由贸易协定》 ( Nafta ),认为必须就该协定重开谈判.The NAFTA debate also exposed the often unnoticed fact that the environmental c...