词典释义：
a bar or series of bars, typically fixed on upright supports, serving as part of a fence or barrier or used to hang things on
横条，横杆，横档；栏杆，扶手。
(
（赛马或赛狗场的）围栏。
the edge of a surfboard or sailboard
冲浪板（或帆板的）边缘。
a steel bar or continuous line of bars laid on the ground as one of a pair forming a railway track
铁轨，钢轨；轨道，铁路
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the goods train left the rails .货车出了轨。
[mass noun][often as modifier]railways as a means of transport
铁路运输
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rail fares 火车票
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travelling by rail .乘火车旅行。
a horizontal piece in the frame of a panelled door or sash window
（镶板门或上下推拉窗的）横档，冒头。比较<Bold>STILE</Bold><Superscript>2</Superscript>.
【电子】 定电位导体轨。
[with obj.]provide or enclose (a space or place) with a rail or rails
给…装横档；用栏杆围
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the altar is railed off from the nave. 圣坛与中殿之间由栏杆隔开。
[with obj. and adverbial of direction]convey (goods) by rail
由铁路运送（货物）
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perishables were trucked and railed into Manhattan. 易腐食品由汽车和火车运进曼哈顿。
[no obj.](in windsurfing)sail the board on its edge, so that it is at a sharp angle to the surface of the water
（风帆冲浪用语）斜板滑行。
(
（强烈或反复地）抱怨；责骂
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he railed at human fickleness .他怒叱人性之无常。
a secretive bird with drab grey and brown plumage, typically having a long bill and found in dense waterside vegetation
秧鸡。
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go off the rails informal begin behaving in a strange, abnormal, or wildly uncontrolled way 〈非正式〉 行为不轨，越轨；出毛病；神经错乱 -
on the rails 1 informal behaving or functioning in a normal or regulated way 〈非 正式〉 在轨道上；顺利，顺遂，正常he is determined to get the club back on the rails . 他决心使俱乐部回到正常轨道上来 -
2 （of a racehorse or jockey） in a position on the racetrack nearest the inside fence （赛马，骑师）近内栏，靠内栏
"Middle English： from Old French
