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...
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...