名词中文翻译1
中文翻译：Unknown
同义词：
["有效长度，可用长度，实用长度例句：1. The engineer calculated the usable length of the track to ensure safety.（工程师计算了轨道的有效长度以确保安全。）2. The train's usable length is limited by the width of the tracks.（火车的有效长度受到轨道宽度的限制。）"]
例句：
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1. The engineer calculated the usable length of the track to ensure safety.
工程师计算了轨道的有效长度以确保安全。
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2. The train's usable length is limited by the width of the tracks.
火车的有效长度受到轨道宽度的限制。
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3.The construction company was asked to extend the usable length of the road for better traffic flow.
建筑公司被要求延长道路的有效长度以改善交通流量。