单词：radio detecting and ranging (radar)
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Hurricane Maria Hit Puerto Ricos Giant Telescope Hurricane Maria severely damaged Puerto Ricos electricity and communications systems. Millions of people there are without power, water or food. 飓风玛利亚严重破坏了波多黎各的电力和通信
2017年VOA慢速英语(十)月
This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? [Radio sound:] Northeast 480 you are cleared for landing, Northeast 480 you are cleared for landing. That same radar technology that guides aircraft and tracks hurrica
Scientific American(十二)月
Antenna 天线 An antenna is used for radio, television, radar and so on. 天线用于广播、电视、雷达等等。 It works in air and under the water. 它适用于空中和水下。 Antennas send signals and receive signals. 天线发送和接收
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Science and technology 科学技术 Low-cost radar 低成本雷达 A programme worth watching 值得一看的节目 How air-traffic control can use television signals to plot aircraft 空中交通管制局如何利用电视信号找出飞行器位置？
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The construction of the project was started in 2011 with an investment of 1.2-billion yuan, or about 180 million US dollars. The 500 metre Aperture Spherical Telescope, or FAST, is the size of 30 football fields. It's located in a hollow that was for
2016CRI中国国际广播电台
新GRE阅读难点之同位语结构 GRE阅读文章中经常会出现同位语结构，同位语是用来对名词或者是名词代词作进一步的解释，一般说来它有单词、短语和从句三种形式。同位语从句是名词从句的一
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