radar
radar/ˈreidə/ (radio detecting and ranging的首字母缩略词)n.[c]雷达,无线电探测器:laser radar激光雷达;a radar set雷达装置;air search radar防空雷达;follow the flight of an ai···
radiant
radiant/ˈreidjənt/adj.1.容光焕发的,喜气洋洋的:faces radiant with smile容光焕发的笑脸;crowds of people radiant with joy喜气洋洋的人群2.明亮照耀的:the radiant sun光芒四射的太阳···
radiate/radiation
radiate/ˈreidieit/vt.&vi.1.辐射,(使)从中心发散:radiate fanwise from…以…成扇形辐射;heat that radiates from a fireplace从壁炉中散发出的热气2.流露,显示:joy radiating from ···
radical
radical/ˈrædikl/ I.n.[c]激进分子: He is a radical in favour of this policy.他是支持这一政策的激进分子。‖II.adj.1.根本的,基本的:make radical changes作根本的改变;a radical pr···
radio
radio/ˈreidiəu/ I.n.1.[u]无线电,无线电广播:send a message by radio拍发无线电报We heard the news over/on/upon the radio.我们从无线电广播中听到这条新闻。2.[c]收音机(pl.radios···
radioactive/radioactivity
radioactive/ˈreidiəuˈæktiv/adj.放射性的:radioactive dust放射性尘埃;radioactive element放射(性)元素radioactivityn.放射性,放射现象
radium
radium/ˈreidjəm/n. [u]镭:Radium can be used to treat cancer.镭可以用来治疗癌症。Radium israre in nature.镭在自然界是十分稀有的。
radius
radius/ˈreidjəs/ (pl.radii /ˈreidiai/)n.[c]半径:the flying radius飞行半径;an action radius活动/作用/有效破坏半径;within the radius of knowledge在知识范围之内
raffle
raffle/ˈræfl/ I.n.[c]对奖售物:He won a car in the raffle.他在兑奖售物活动中赢得了一辆汽车。The money was raised by the sale of raffle tickets.这笔款子是通过出售购物彩券筹集的。···











