例文
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- A torque is not necessarily limited to rotation around a fixed axis, however.
- Make a trapezoid with each edge and its projection onto a chosen fixed axis.
- Consider a rotational movement of a rigid body about a fixed axis in an inertial frame.
- In any rotation in three dimensions there is always a fixed axis, the axis of rotation.
- Unlike Earth's rotation, a chaotic rotation may not have a fixed axis or period.