你可以先拉伸一条腿，然后换另外一条腿，或者将手从一边移动到另外一边。
You can vary this exercise by stretching first one leg, then the other, or by moving your hand positions from side to side.
例如，在万能拉伸试验机上，固定端和移动的十字滑块之间的变形是以恒定速度进行的。
For example, in the universal testing machines, the motion between the fixed and moving crossheads can be controlled at a constant speed.
我们设计回应是“重新定义的边缘”，创建一个移动的边界，可以自由拉伸和压缩，而不一定是直接和挑战传统的结构和容器挑战。
Our design response was to "redefine the edge" to create a boundary on the move, in tension and compression, not necessarily straight and challenging the traditions of structure and container.
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