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1. The engineer used a proportionscale to measure the length of the pipe.
工程师使用比例尺来测量管道的长度。
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2.The surveyor measured the area using aproportional scale.
测量员使用比例尺测量了面积。
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3. The architect designed the building witha proportional scale in mind.
建筑师在设计建筑时考虑了比例尺。