It wasn’t until the discovery of the reaction principle,which was the key to space travel and so represents one of the great milestones in the history od scientific thought ,that rocket technology was able to develop.(剑3，T1，R)

　　直接反作用原理——宇宙航行的关键理论，代表科学思想史上的伟大里程碑之一—发现之后，火箭技术才得以发展。

　　The British rocket differed from the Indian version in that it was completely encased in a stout,iron cylinder,terminating in a conical head ,measuring one meter in diameter and having a stick almost five meters long and constructed in such a way that it could be firmly attached to the body of the rocket.(剑3，T1,R)

　　英式火箭和印度火箭的区别在于，前者是全完密封在一个直径为一米、坚固的铁质圆柱体内，终端为圆雏形，还配置了一根五米长的杆，专门用来与箭身牢牢捆绑在一起。

　　Leaving aside the philosophical question of whether anyone should have to breathe someone else's cigarette smoke, the report suggests that the smoke experienced by many people in their daily lives is enough to produce substantial adverse effects on a person’s heart and lungs.(剑3，T1，R)

　　至于人们是否应该吸入别人吐出的烟雾，这是个哲学的问题，姑且搁置不论，这份研究报告指出，许多人在日常生活中所接触的烟雾已足以对他们的心脏和肺部产生严重的负面影响。

　　The researchers criticize the practice of some scientific consultants who work with the tobacco industry as assuming that cigarette smoke has the same impact on smokes as it does on non-smokers.(剑3,T1，R)

　　有些为香烟工业服务的科学顾问做出这样的假设：香烟烟雾对吸烟者或非吸烟者来说，其影响都是一样的。他们的这种假设收到研究人员的批评。

　　The argue that those scientists are understanding the damage done by passive smoking and, in support of their recent findings,cite some previous research which points to passive smoking as the case for between 30,000 and 60,000 deaths from heart attacks each year in the United States.(剑3，T1，R)

　　他们认为，那些科学家低估了被动吸烟所造成的损失，同事还引用了一些先前的研究成果以支持他们最近的调查结果，所引资料表明，美国每年都有三至六万人因为被动吸烟而死于心脏病发作。