名词
中文翻译：直尺
同义词：
['ruler', 'straightedge例句：1. This ruler is very precise and easy to use.（这把直尺非常精确且易于使用。）']
例句：
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1. This ruler is very precise and easy to use.
这把直尺非常精确且易于使用。
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2.The engineer used a ruler to measure the length of the beam.
工程师用直尺测量梁的长度。
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3. The student carefully marked the straight edge on the paper.
学生小心翼翼地在纸上标记了直边。