So what is the period of an oscillation?
所以摆动的周期是多大?
So this is a hard prediction what the period of an oscillation - should be — 21.5 plus or minus a half second.
因此这是个艰难预测,震荡的周期,应该是-,21。5加减0。5秒。
So this is a hard prediction what the period of an oscillation - should be — 21.5 plus or minus a half second.
因此这是个艰难预测,震荡的周期,应该是-,21。5加减0。5秒。
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