一辆汽车有两个运动自由度，在司机的指引下汽车还可以向左转向右转。
A car, under the direction of its driver, has two freedoms motion, it can also turn left or right.
玛丽说她看到这个小女孩向左转向那个男人并对他说：“我能很快见到妈咪吗？”
"Marie, left, said the girl turned to the man and said:" Can I see mummy soon?
没有人决定是向左转还是向右转，甚至根本没人决定转向，没有主要的负责人。
Nobody decided whether to turn left or right, or even to turn at all. Nobody was in charge.
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