signals travel at the speed of light.

radio waves also travel at the speed of light.

无线电波也是以光速传播的。

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solution: radio waves travel at the speed of light.

解答疑团：无线电波的传播速度与光速相同。

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after all, radio signals travel at the speed of light.

毕竟无线信号是以光速传播的

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it goes without saying that these waves travel at the speed of light.

显然，这些波是以光速传播的。

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since x-rays travel at the speed of light, the echo indicates that an object fell into the black hole around 350 years ago.

因为X射线以光速运行，因此反射表明，大约在350光年前，有一个物质落入黑洞。

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as we learned in school, radio signals all travel at the speed of light, but this is literally true only in an absolute vacuum.

我们在学校里边知道了无线电信号都是以光速行进的，但是这句话只有在完全的真空中才是完全正确的。

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quasi-static absolute calibration on pressure-measuring sensors

化学量传感器压力传感器准静态绝对校准

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two meanings of in-situ calibration of borehole strainmeters, namely relative calibration and absolute calibration, are identified.

提出钻孔应变观测的实地标定问题有相对标定和绝对标定两层涵义；

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computation of plant unfalsified frequency response with a prescribed probability absolute calibration of acoustic transducers with pseudorandom signals

随机噪声框架下非伪频率响应的计算方法水声换能器的随机噪声绝对校准

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the absolute calibration of the am-be neutron source with the manganese sulphate bath

用锰浴法绝对定度Am-Be中子源

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absolute calibration of acoustic transducers with pseudorandom signals

水声换能器的随机噪声绝对校准

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the laser interferometer for absolute calibration of the mossbauer transducer velocity is described and the results are discussed.

本文叙述了穆斯堡尔谱仪激光干涉绝对测速方法，并描述了一台相应装置及测试结果。

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means of quasi-static absolute calibration of pressure-measuring transducers based on the drop-hammer dynamic pressure calibration system

基于落锤动标装置的传感器准静态绝对校准方法

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an absolute calibration of the efficiency for a ge ( li) anti-compton detector system

Ge（Li）反康普顿探测系统效率的绝对刻度

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an absolute calibration method of pvdf membrane hydrophone

聚偏氟乙烯薄膜水听器的绝对校准方法

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on the problem of absolute calibration of digital wavefront interferometers

波阻抗近似反演数字波面干涉仪的绝对校正问题

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absolute calibration of kodak-swr film in region of soft x-ray wavelength

对Kodak-SWR底片在软X光波段的绝对标定

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absolute calibration of x-ray films using low-energy radioactive source

用低能放射性源对X光底片作定量标定的方法

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an absolute calibration method for ac current comparator

交流电流比较仪的一种绝对校验方法

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absolute calibration of sensitivity of xrd on the synchrotron radiation source

XRD灵敏度在同步辐射源上的绝对刻度

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