She set up shop as a bookseller in Beijing.她在北京开了一家书店.She set up shop as a bookseller in the High Street.她在大街开了一家书店.All these books may be had of any bookseller.所有这些书可以从任何书店买到....an antiquarian bookseller.古籍商...
用金属锂 - 液氨一步还原法合成γ姜黄烯.实验证实γ姜黄烯极不稳定,室温下极易芳香化转变成α姜黄烯.The synthesis of ν - curcumene was described. The experiment affirmed that ν - curcumene can aromatize to α - curcumene readily at room temperature....
Neural networks are computer systems which mimic the workings of the brain.神经网络是模拟大脑工作方式的计算机系统。Designing silicon chips to mimic human organs sounds fanciful.设计硅芯片模仿人的器官听上去是异想天开。He could mimic anybody.他可以模仿任何人。...
卡车倒车和掉头的时候，我听见发动机的轰鸣声。I heard the engines revving as the lorries backed and turned.他们不时地听到大卡车的轰鸣声。Now and then they heard the roar of a heavy truck.听到发动机的轰鸣声，杰克猛地抬起了头。Jake's head jerked up at the throb of the engine...
乙烯和反式二氯乙烯在红外光谱的这个区域都无活性.Ethylene and trans - dichloroethylene are both inactive in the infra - red in this region.光谱的原色是红 、 绿、蓝.The primary colors of the spectrum are red, green and blue.原子光谱的研究能给出原子能级信息.Investigation of...