This is the 4941st most frequent Chinese word.
轨道
Orbit; track; rail.
轨道 in this sentence refers to the path followed by celestial objects in their motion around a central body due to gravitational forces.
地球的轨道绕着太阳运行。
The Earth's orbit revolves around the sun.
轨道 here pertains to the physical tracks or rails on which trains and similar vehicles travel.
火车运行在铁轨的轨道上。
The train runs on its track's route.
轨道 in this instance metaphorically indicates the predetermined or established course of progression or workflow for a project or process.