| 单词 | main line |
| 释义 | main line 1. a principal line or route of a railroad, as contrasted with a branch or secondary one. 2. a principal highway. 3. Slang. a. a prominent and readily accessible vein of the body that may be used for a narcotic's injection. b. the act of mainlining. [1835-45] |
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英语词典包含168451条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。