So you are free to choose, when you are near Earth, where you choose your zero.
如果你接近地球，你可以任意选择零点，现在我们选择。
That move would free the Fed to cut interest rates below zero.
这一举措将使美联储可以将利率降为负数。
That is, it is essentially impossible to get a free zero.
也就是说，基本上没有可能以低代价获得一个零点。
Free from the space limitation indoor — "zero space" occupation.
不受室内摆放地方限制“零空间”占用。
However at the free end, displacement is double and strain is zero.
在自由端，应力为零而位移加倍。
However at the free end, displacement is double and strain is zero.
在自由端，应力为零而位移加倍。
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