以下为句子列表：
英文: High-speed analog-to-digital conversion chips can thus exploit hundreds of megahertz of RF spectrum simultaneously.
中文: 高速类比数位转换晶片因此能同时运用数亿赫兹的RF频谱。
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英文: In actual fact, a suitably modified amateur radio transmitter operating in either the 420 to 450 megahertz band or the 1.3 gigahertz band, with a highly directional antenna, is capable of transmitting voice to skull signals at less cost than the price of
中文: 事实上,一个适当限制在420到450兆赫波段或1.3千兆赫波段的带有高度定向天线的业余无线电广播发射机,能够把声音信号传给头骨并且所花的费用比一辆汽车的价格还要少。
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英文: Initially RFID tags worked only at frequency bands of 13.56 megahertz or lower.
中文: 早期的射频识别标签只能在13.56百万赫兹或更低的频率下作用。
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英文: The speed of a computer is usually expressed in cycles per second. Typical machines operate at 100 to 200 megahertz or 100 million to 200 million cycles per second.
中文: 计算机的速度通常用每秒（执行）的（时钟）周期来表示。典型的机器运转在100到200兆赫或者说每秒100到200兆周期。
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英文: Units: megahertz (MHz) AM (amplitude modulation), 200 and up are for military use, but are staffed by the same civil controllers.
中文: 单位：兆赫，调幅，200以上为军用，亦为民航管制员执勤。
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