... theory）基于垄断竞争、产品的差异化以及规 模收益递增的框架来分析产业的空间分布问题，认为由于向心力（centripetal forces） 和离心力（centrifugal forces）的共同作用导致产业的空间集中与分散。
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N a force that acts inwards on any body that rotates or moves along a curved path and is directed towards the centre of curvature of the path or the axis of rotation 向心力 → compare centrifugal force
When the dog shakes, centripetal forces pull the water away.
狗一抖动，向心力就使水脱身而出。
Galactic matter orbits around a central point because its mutual gravitational attraction creates centripetal forces.
由于星系的重力产生了向心力，所以星系的物质体是环绕着一个中心点运行的。
Water is attached to the dog by surface tension, they thought, and the sinusoidal shaking creates centripetal forces that ejects that water off the body.
他们认为水沾在身上靠的是身体表面的亲和力，正弦波状的抖动动作制造了水脱离身体的离心力。
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