That's a heterodyne receiver.那是外差式接收机.The Doppler frequency can be obtained as a heterodyne or beat effect.由于外差或频差效应,能够得到多普勒频率.Function test and calibration self - heterodyne curve for direction finder on sea trial....
The Doppler frequency can be obtained as a heterodyne or beat effect.由于外差或频差效应,能够得到多普勒频率.That's a heterodyne receiver.那是外差式接收机.Function test and calibration self - heterodyne curve for direction finder on sea trial....
We set off to see the Pyramids and Sphinx.我们出发去看金字塔和狮身人面像。He also studied the ancient stone tablets from around the pyramids.他还研究了在金字塔周围发现的古代石匾。One of the seven wonders of the ancient world was the Pyramids.金字塔是古代世界的七大奇迹...
Gneiss, a metamorphic rock, can be commonly found in Precambrian areas.片麻岩, 变质岩, 可以发现,在常见的前寒武纪地区.Precambrian time for as much as eighty - five percent of all geological time.从前寒 武 世纪以来地球地面大部分被冰川所覆盖的任何地质年代.Late Precambria...
填写下面的订货单即可。Simply complete the coupon below.离线订货请拨打这个号码。For offline orders, call this number.我们来年的订货簿已经记满了。We have a full order book for the coming year....
Demolition derbies are large - scale automobile rodeos that take place in big arenas.撞车比赛指的是在很大的竞技场上举行的大型汽车驾驶技术表演.Are there areas of privacy in the most public of arenas?在绝大部分公开的场合中存在需要保护隐私的领域 吗 ?Lessons are being learne...