The Complete Book of 100,000 Reasons Why
Favlit. ten thousand reasons why
为什么火车会有轨道呢？
火车在运行过程中需要一个稳定的轨道来支持和引导，而轨道的存在有以下几个原因：
1、安全性：轨道可以确保火车的行驶方向，防止偏离轨道造成事故。
2、稳定性：轨道结构可以支撑火车的重量，使其在高速行驶时保持稳定。
3、降低阻力：轨道上的轮轨接触面积较小，减少了摩擦阻力，提高了火车的运行效率。
4、方便维护：轨道能够方便地进行检修和维护工作，确保轨道的平整和安全。
5、导向作用：轨道可以引导火车按照预定路线行驶，不受外界干扰。
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