For an initial service, a 10 megahertz-wide band of frequencies will be needed.初始服务需要10兆赫宽的频带。If the frequencies are low, this approach cannot be used.若频率很低时, 这种方法就不能使用.The electromagnetic spectrum covers an enormous ran...
For an initial service, a 10 megahertz-wide band of frequencies will be needed.初始服务需要10兆赫宽的频带。Of an electronic circuit or device; having an output proportional to input; amplifying or attenuating all frequencies equally....
白垩纪尚无壳斗科可靠的大化石记录,微化石需要进一步研究才能确定亲缘关系以及古新世壳斗科已经分化出两个类群.No creditable macrofossil record of the Fagaceae exists in the Cretaceous equivocal and require further study....
Sincflex is the earliest manufacturer in making membrane couplings in China.97年申克公司收到英国米切尔机械学会邀请参加膜片联轴器研讨会.John Crane : fitting and maintenance instructions of high performance couplings.JohnCrane: 高性能联轴器的配件及维护说明.Hoses -...
她得意地笑着把雪茄给贾森递了回去。She handed the cigar back to Jason with a self-satisfied smile.“抱歉出去一下，”她对贾维斯说，然后离开了房间。"Excuse me," she said to Jarvis, and left the room.贾森已经脱下夹克，松开了领带。Jason had taken off his jacket and loosened his ti...