sidetracks

铁路主线旁一段较短的轨道,一端或两端通过道岔与主线相连,用于卸货或使同轨道上的两列车交会(对向)或超越(同向)；即铁路侧线。

A second, relatively short length of track just to the side of a railroad track, joined to the main track by switches at one or both ends, used either for unloading freight, or to allow two trains on a same track to meet (opposite directions) or pass (same direction); a railroad siding.

任何与主线相邻的辅助铁路轨道(区别于侧线)。

Any auxiliary railroad track, as differentiated from a siding, that runs adjacent to the main track.

从主隧道或主井旁钻出的辅助性较小隧道或井。

A smaller tunnel or well drilled as an auxiliary off a main tunnel or well.

偏离当前主题或中心活动的另类思路、问题、话题或活动,在重要性或效果上处于次要或从属地位。

An alternate train of thought, issue, topic, or activity, that is a deviation or distraction from the topic at hand or central activity, and secondary or subordinate in importance or effectiveness.