These are not qualities readily subject to measurement .

这些都是不容易被测量的品质。

This is not an easy measurement to make .

这不是一个简单测量就能得出的结论。

And they allow passive measurement eliminating the need for tedious active monitoring .

传感器可以用于被动测量，从而避免了冗长的主动监测过程。

Mass is the most obvious . A more subtle measurement is spin .

质量是最明显的，一个更敏感的衡量标准是旋转。

They report no indication of any effect within the measurement accuracy of the experiment .

他们的报告称在进行了精确的实验测量后并没有发现任何效应。