tramlines

noun

1. 电车轨道
   the rails in the street that trams run on
2. （网球或羽毛球双打时）球场两侧的加线
   the pair of parallel lines on a tennis or badminton court that mark the extra area that is used when four people are playing

1. 电车轨道
   A tramline is one of the rails laid in the surface of a road that trams travel along.

in AM, use 美国英语用 streetcar line

1. History does not, except for Marxists, move on tramlines.
   历史并非沿着轨道直行（只有马克思主义者那样认为）。
2. Much of the debate has fallen into the familiar tramlines of a clash between an authoritarian right and a compassionate left.
   多数的争论已经变成了人们所熟悉的类似列车冲突，权利主义者向右，同情者向左。