The seismometer has one vertical component and two horizontal components.
地震计由一台垂直向和两台水平向组成。
Well here we're looking at the vertical component from the seismometer, and this is just the background motion.
我们在看测震表上的竖直部分，这只是背景移动。
Well here we're looking at the vertical component from the seismometer, and this is just the background motion.
我们在看测震表上的竖直部分，这只是背景移动。
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