环线: circle linedividing-lineloop lineloop wireloowirering roadschort
终点: 1.(一段路程结束的地方) terminal point; finishing point; destination 短语和例子旅行的终点 destination of a journey2.[体育] finish; 终点裁判员 [体育] judge at the finish; 终点裁判长 [体育] the chief judge at the finish; 终点场 t