名词
中文翻译：Unknown
同义词：
['line', 'trail', 'path', 'track', 'trailing line']
例句：
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1. The artist drew a beautiful after line on the canvas.
这位艺术家在画布上画了一条美丽的线条。
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2. The hikers followed the after line to reach the summit.
登山者沿着这条线路到达山顶。
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3. The engineer designed a new trail following the after line of the old one.
工程师设计了一条新的路线，沿着旧路线的后线。