微震，脉动由自然现象，如风或强海波引起的轻微地球震动。
A faint earth tremor caused by natural phenomena such as winds and strong ocean waves.
微震，脉动由自然现象，如风或强海波引起的轻微地球。
A faint earth tremor caused by natural phenomena, such as winds and strong ocean waves.
大多数自然现象都是由地球的内在过程引起的，这能够通过长度和时间来权衡。
Most natural events result from interrelated Earth processes with scales that are measured in lengths and times.
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