The former one is now widely used in the monopulse system to calibrate the amplitude and phase imbalances between the sum and difference channels by injecting test signals.
离线校正的方法是现阶段单脉冲雷达系统进行和差通道幅相校正采用的主要方法，它通过注入测试信号的方法来得到对误差接收通道幅相特性的估计。
Seven years ago, biochemist Zheng Cui of Wake Forest University was conducting a routine experiment, injecting test mice with a strain of cancer cells so aggressive it caused a 100 percent death rate.
七年前，威克森林大学的生物化学家崔政正在进行一个常规的试验：他给试验鼠注射一种攻击性很强的癌细胞，致死率100%。
Seven years ago, biochemist Zheng Cui of Wake Forest University was conducting a routine experiment, injecting test mice with a strain of cancer cells so aggressive it caused a 100 percent death rate.
七年前，威克森林大学的生物化学家崔政正在进行一个常规的试验：他给试验鼠注射一种攻击性很强的癌细胞，致死率100%。
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