没有讯号
双语例句原声例句
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没有噪音的跟踪方法：将功放的输入(rca)恢复，解除CD机的讯号输出，检查是否有噪音。
B, no noise tracking method: input power amplifier (RCA), released the CD signal output, check whether there is noise.
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带磁性颗粒的抗体要是没有与样本产生结合，会在溶液中快速旋转，因而无法产生磁性讯号。
Labeled antibodies that have not docked to the sample tumble about so rapidly in solution that they give off no magnetic signal.
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那位没有经验的飞行员驾驶技术很差，飞机大部分时间都偏离了无线电讯号指示的航道。
The inexperienced pilot flew the plane badly; it was off the beam most of the time.
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Until the teens, telephones were very expensive because they didn't have good amplification technology.
在20年代之前,电话还是奢侈品,因为它们还没有增强讯号技术
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