英语词汇“main line”是什么意思，“main line”的读音、用法及例句翻译-烛光网

词汇	main line
释义	main linen.（名词） A principal section of a railroad line.干线：铁路线的主要部分 Slang A principal and easily accessible vein, usually in the arm or leg, into which a drug can be injected.【俚语】主静脉：主要的并很容易能触摸到的静脉，常见于手臂或大腿上，可以向里面注射毒品
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