1. Below the water line of a vessel. 
   在船的吃水线以下
2. A line used in towing a vessel or vehicle. 
   拖绳用来拖船只或车辆的绳索
3. line thrown from a vessel that people can cling to in order to save themselves from drowning. 
   一种从船上扔下的用于人们攀援救命的绳索。
4. When the conference is over, participants simply hang up the phone and disconnect the modem line. 
   当会议结束时，与会者只是简单地挂上电话，断开modem线路即可。
5. To move(a vessel) by hauling on a line that is fastened to or around a piling, an anchor, or a pier. 
   曳（船）用拉系于桩基、锚或码头上的绳的方法使（船）移动

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