水平位移测量 horizontal displacement measurement 倾斜测量 declivity survey；tilt survey 日照变形测量 sunshine deformation survey ..
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他们还用各种各样的仪器和方法，通过测量地震前发生的地球物理上的变化，如地表倾斜度和 活性断层附近的磁场变化，对地震进行预测。
These instruments measure tilts int the ground's surface, as well as changes in the magnetic field near active faults . Usually these changes precede the occurrence of some earthquakes.
增加倾斜度，这很容易测量。
测量摩擦系数有一种简单方法,把物体放置在斜面上,然后不断增加斜面的倾斜度,这是角α
It is fairly easy to measure a friction coefficient by putting an object on an incline and by changing the angle of the incline, increasing it This is the angle alpha.
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