他在建筑工地上当起了小工。He became a hod carrier on a building site.傍晚时分兜售各种花哨小工艺品的小贩常把街道阻塞.Toward evening peddlers selling various fancy goods would fill up the street.小摊儿上有很多小工艺品卖,价格不贵.There are many small and cheap articles in th...
They remain the main providers of sports facilities.他们仍然是体育设施的主要提供商。For enterprises and service providers, the use of network processors ensures against premature product obsolescence.对于企业和服务供应商而言，采用网络处理器保证不会使未成熟产品被淘汰。We...
目的以对羟基苯甲醛为底物,通过微生物的转化作用生物合成天麻素.Aim To synthesize gastrodin via biotransformation of microorganism using p - hydroxybenzaldehyde as substrate.方法: 以甲醇为溶剂,以对羟基苯乙酮和溴为原料制备了α - 溴-4-苄氧苯基苯乙酮.Methods: α - Bromo - 4 - benzyloxy ac...