| 单词 | 主线 |
| 释义 | 〔offset〕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〔magistral〕the magistral line of fortifications.防御工事的主线〔projection〕A thing or part that extends outward beyond a prevailing line or surface:凸出物：向外延伸超出一条主线或主平面以外的事物或部份：〔stem〕The main line of descent of a family.家系：家族世袭的主线〔retread〕retreading a familiar story line.改编一个熟悉故事的主线〔extension〕An additional telephone connected to a main line.电话分机：一部连到主线上的增设电话〔outboard〕Being in a position that is away from the center line of the hull of a ship.舷外的：位于偏离船体主线位置的 |
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