True, the robot De Ming (Alex Fong) featured in the movie isn`t a bird or a plane, but neither is he a character that will linger in your mind beyond 2009.
You could say the position vector at another time, or at any time, but in fact, what's also true is that the velocity vector is in the plane.
你可以说，位置矢量在另一个时间或在任何时间，无论如何，位置矢量始终在这个平面上。
3
An equation for the calculation of true shear strain was derived from the integration of infinitesimal shear strain in plane shearing process with constant principal shear strain direction.