His mother leaned forward and gave him an approving look.他的母亲探身向前，对他投以赞许的目光。He gave me an approving nod.他向我点头表示同意。She was listening, smiling, approving, and yet not finally agreeing.她倾听着, 微笑着, 赞赏着, 但是最后却不能苟同....
I sat on the stairs and watched, fascinated.我坐在楼梯上出神地观望。I slid into a depression and became morbidly fascinated with death.我陷入消沉，开始对死亡有种病态的迷恋。I was always fascinated by the acrobats at the circus.我总是着迷于马戏团里的杂技演员.A new ge...
我们将研究称为收敛数列的很特别的一类数列.We shall study a very particular kind of sequences, called convergent sequences.数据数列是表达资料的一种最简单的方法.The data array is one of the simplest ways to present data.这些综合指数是使通过把它们的组成部分中的各个数列标准化而获得的.These com...
Thus , this reduced temperature of reaction and increased the rate of acetophenone.降低反应温度,提高了苯乙酮的收率.Objective: A new approach to prepare α - bromo - 4 - benzyloxy acetophenone was introduced.目的: 报道一种合成α - 溴-4-苄氧苯基乙酮的新方法....