We can't measure it over billions of years or over billions of light years, but we can measure it to very, very high precision in the laboratory.
我们无法回到数十亿年以前或到数十亿光年以外的距离进行衡量，但我们可以在实验室以非常，非常高的精度测量它。
The variation of structural frequency before and after the damage is believed to be a most available and widely used modal parameter because of its easy testability and high measure precision.
由于结构频率测试容易测试并且有较高的测量精度，因此成为损伤识别中广泛应用的模态参数。
The first part is the introduction of high precision inductance probe, including measure principle and measure circuit.
第一部分是对高精度电感测头的介绍，包括其测量原理及测量电路。
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