Any of various types of cable, wire, etc., by which a signal is sent; (Diving) = "lifeline".
Mid 19th century; earliest use found in Waldie's Select Circulating Library.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。