In his reference frame, Santa sees us basically as frozen.
在圣诞老人的参照系中，他看到的我们基本是静止的。
Now, the kinetic energy and the momentum depend on your reference frame.
那么动能和动量，取决于你的参考系。
The physical meaning and characteristic of reference frame power are illustrated in detail.
推导了功率表达式，阐明了参考坐标系功率的物理意义和特性。
The proposed system is constructed in a synchronously rotating reference frame and is very simple.
该系统建立在同步旋转坐标系下，数学模型较为简单。
The proposed system is constructed in a synchronously rotating reference frame and is very simple.
该系统建立在同步旋转坐标系下，数学模型较为简单。
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