天文学家们过去一直感到奇怪,为什么只有土星有光环.Astronomers used to ask why only Saturn has rings.“土星族”飞行器可以分为三类或三组.The Saturn family of launch vehicles falls into three types or groups.数值例子大多数取自“土星V”飞行器的研究.Numerical examples are mostly taken ...
Regular inspections are carried out at the prison.经常有人来视察这座监狱。Physical inspections or tests may also take the place of formal hearings.有形的检查或检测也可代替正式的听证.For all other inspections, a warrant was still necessary.至于所有其他的检查,...
The cold has made already substandard living conditions even worse.寒冷使得已经较差的生活环境变得更糟糕。Too many families are still living in substandard housing.仍有太多家庭居住条件达不到标准.The reputation of the firm was blown upon for passing substa...