名词
中文翻译：中心线
同义词：
['central line', 'longitudinal axis']
例句：
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1.The center-line of the ship is marked by a white stripe on the deck.
船的中心线在甲板上用一条白线标记。
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2. The engineer carefully measured the center-line of the beam to ensure it was straight.
工程师小心翼翼地测量了梁的中心线，以确保它直的。
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3. The construction crew had to align the center-lines of the crane and the building to avoidcollision.
建筑工人必须将起重机和建筑物的中心线对齐，以避免碰撞。