名词
中文翻译：线的定义
同义词：
['line', 'lineage', 'lineage definition']
例句：
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1. The line of reasoning is clear and logical.
推理的线索清晰且逻辑。
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2. The line of the river runs through the city center.
河流的直线穿过市中心。
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3. The line definition of a mathematical equation is crucial for solving it.
数学方程的直线定义对于解决它至关重要。