main line

主线;干线;主动脉

With their aid a vital viaduct on the main Athens railway line was destroyed
在他们的帮助下，破坏了雅典铁路干线上的一座主要高架桥梁。收藏
These three main indexes all went around the level line, but with a mid wave. Big slumps or jumps as in several recent trading days did not happen
三大指数周二大部分时间都在平盘上下游走，但是走势温和，未出现最近几个交易日大起大落的情况。收藏
A short distance measured perpendicularly from the main line in surveying,used to help in calculating the area of an irregular plot.
支距在测量中，从主线垂直测得的一个短的距离，用以帮(辅)助计算一不规则的小块土地之面积收藏

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