动词
中文翻译：垂直地
同义词：
['perpendicular', 'vertical', 'upright']
例句：
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1. The wall was plumbstraight from the ceiling to the floor.
这堵墙从天花板到地板都是笔直的。
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2. The carpenter used a plumb line to measure the angle of theroof.
木匠用一根铅垂线来测量屋顶的角度。
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3. The builders were plumb proud of their workmanship.
建筑工人对他们的工艺非常自豪。