Bbc world service is the world ' s biggest radio network , with 140 million listeners across the globe , broadcasting in 44 languages , heard on short - wave , medium - wave , fm and satellite 英国广播公司国际广播电台是世界上最大的广播网，在全球拥有1 . 4亿听众，可以通过短波、中波、调频和微行勇种语言进行节目广播（向全球进行广播） 。
2.
The single chip computer control systems designed of miniature water works in the paper could be realized practically , the anticipant object could be attained . the studyof the single chip computer control systems offered another way to design the automational control system of miniature water works theoretically , at the same time , it was the innovation of this paper 在生产实践中，文中设计的小型水厂单片机控制系统是可以实现的，是可以达到预期的目的的；在理论上，小型水厂单片微行计算机控制系统研究也为小型水厂自动化控制系统提供了另外一种设计思路，同时，这也是论文的创新所在。
3.
Models of the solar system ' s early history posit that the frequency of impacts should have tapered off between 4 . 5 billion and four billion years ago because most of the planetesimals ? the small rocky bodies that formed from the solar nebula ? were gradually cast out of the inner solar system or absorbed by the outer planets 描述太阳系早期历史的模式假设，撞击频率应该在45 ~ 40亿年前趋缓，因为大部份的微行星（由太阳星云形成的小型石质天体）逐渐被驱逐出内太阳系或被外行星吸收。
