the third rail

You know this is the third rail, right?

你知道这是第三根铁轨对吧？

It was private land, dissected by the driveways, the buck-and-rail fences, the arched gateways of people wealthy enough to have a second home, or a third, on the headwaters of the Green.

这是位于绿河源头的私人土地。那些有能力拥有第二或第三个家的有钱人用车道、架子横杆围栏，和拱形通道将这里划分成几部分。

The trains are also packed with locals following the decision in the middle of 2008 by Thailand's rail network to offer free third-class travel for Thai nationals on certain routes.

根据泰国铁路网在2008年中旬的决定，列车同时也为当地人提供某些路线的三等车厢搭载服务。