running line

• 活动索

running line的用法和样例：

例句

1. The slant of the line showed he was swimming at a lesser depth.
   钓索的斜度说明它正在较浅的地方游着。
2. The captain cast off the line and we were soon out in the open water.
   船长解开了船索，我们很快就出航了。