物理现象和过程存在各种联系,在这些联系中,有的是本质的必然联系,有的是非本质的偶然联系。如汽车刹车时,车上的乘客会向前倒,紧急刹车时,乘客甚至会向前冲去。这实质上是乘客表现出惯性的现象与惯性之间存在本质联系。从现象上看,乘客是否具有惯性与汽车刹车有关,与刹车的急 There are various connections between physical phenomena and processes. Among these connections, some are essential inexorable connections, and some are non-essential accidental connections. If the car brakes, the passengers on the car will fall forward. When the car is braked, the passengers will even rush forward. This is essentially an essential link between the phenomena in which passengers exhibit inertia and inertia. From a phenomenological point of view, whether passengers have inertia and brakes related to the car, and the brakes