n.第三轨，接触轨；极具争议的问题；险局

n.电动机车的输电轨（借以供给动力），烈酒

third rails───n.第三轨，接触轨；极具争议的问题；险局

third grade───三级；三年级

chair rail───n.钉在室内墙上使墙壁不被磨损的木条；[建]护墙板

guard rail───防护轨

third base───第三垒

third man───n.第三守场员位置；第三守场员

third-rate───低劣的；三等的

third reading───第三读

third grades───三级；三年级

lower proportion than in Greece or Sweden, but far higher than in America, where raising fuel taxes is nonetheless said to be a "third rail", deadly to politicians.───比希腊和瑞典低一些，但是远远的高于美国。在美国，提高燃油税就像是第三铁道，对于政客来说是致命的。

In some cities, a third rail provides power to a subway train, usually operating underground; electricity passes through the rail.───在一些城市，第三道铁轨(电动机车的输电轨)给通常在地下运行的地铁列车供电，电力通过这道铁轨传输。

Third, rail subsidy should be redirected.───第三, 铁路津贴要再分配.

You know this is the third rail, right?───你知道这是第三根铁轨对吧？

But personnel benefits are a "third rail" issue in Congress - untouchable, she said.

But such troubles is confined mainly to the railways on which the current is picked up from a third rail rather than from overhead conductors.

This means that there is always a third rail or an overhead wire carrying an enormously high electric current.

Surreptitiously,(http://sentencedict.com/third rail.html) I stuck boogers on the ends of my fingertips and then tossed them on to the third rail of the subway.

You know this is the third rail right?

The higher requirements for traction power supply net are needed by the development of urban mass transit and the way of power supply by the third rail is widely used.

The diagram above shows a top contact third rail system but there are other types as shown in this diagram.

The third rail system uses a "shoe" to collect the current on the train.

Third rail current collection comes in a variety of designs.