Loads distort every component of the structure of the Cassegrain antenna system.载荷使卡塞格伦天线结构的每个部分发生变形.This paper presents a high power feed system for 7.3 m Cassegrain antenna.介绍用于?7.3mCassegrain天线的高功率馈源喇叭的设计.Participate ...
A computer would have been invaluable for this job.一台计算机对这个工作的作用会是无法估计的。The book is an invaluable aid to teachers of literature.这本书对于教授文学的老师来说帮助非常大。If you are a regular reader of Homes & Gardens you will know what an inv...
大气中含有70%以上的氮气.The atmosphere consist of more than 70 % of nitrogen.这只是对威尔逊氮气云室的一种改进.It was an adaptation of Wilson's cloud chamber, filled with nitrogen gas.采气管得用氮气吹扫.Sample gas tubes are flushed with nitrogen....
几百张卷紧的报纸在为数5万的人群中被点燃。Hundreds of tightly rolled newspapers were set aflame among the 50,000 crowd.这种产品看起来和点燃后都与常见的香烟没什么两样。The product looks and burns like a regular cigarette.查尔斯点燃了导火索，他们便赶紧四处躲避。Charles lit the fuses and...
这一方案能为产量较小的公司带来滚滚财源。The programme was a gold mine for small production companies.航空公司投入了大笔资金购买噪音较小的新型飞机。The airlines have invested enormous sums in new, quieter aircraft.枯草热是年纪较小时会患的一种病。Hay fever is an affliction which a...
48周时片状ADM的吸收率为28.2%,低于自体真皮的吸收率 ( 39.4% ).The absorptivity of ADM ( 28.2 % ) was lower than the self - dermis ( 39.4 % ).孩子们的脚最好穿真皮的鞋.Its good for children's feet to be shod With real leather.全是真皮的 吗 ?Are they all ma...