地埋示踪线：示踪线，流线，迹线的区别

示踪线：也有人称之为烟线，定义是所有经过过同一位置的流体质点，在某一时刻下形成的连线。如果我们在流场中某个点，不断的释放不考虑质量的烟雾或者墨水，那么这些在同一位置点冒出的烟雾和墨水在某一时刻时形成的线，就叫做示踪线。

Tracer line: also known as smoke line, defined as the line formed by all fluid particles passing through the same location at a certain moment. If we continuously release smoke or ink that does not consider mass at a certain point in the flow field, then the line formed by the smoke and ink emitted at the same point at a certain moment is called a tracer line.