A seismoscope is an apparatus or device which only indicates that an earthquake has occurred.
验
器是仅仅指

发生
仪器或装置。
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On Earth you can use a compass – an instrument with a magnetic needle that moves to point north, that is towards to the magnetic pole – a point near the North or South Poles where Earth's magnetic field is strongest.
在地球上,你可以使用指南针“compass”,即一种带有磁针
仪
。磁针永远指向北方,也就是指向磁极“magnetic pole”。地球
磁极在北极和南极附近,那里磁场最强。