名词
中文翻译：梯子
同义词：
['step ladder', 'scaffolding ladder', 'rung ladder']
例句：
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1. He climbedup the ladder to reach the top of the tree.
他爬上梯子爬到树顶。
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2.The builders used a ladder to move heavy boxes.
建筑工人使用梯子搬运重箱子。
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3. The ladder was too short for her height, so she had to climb down.
梯子对她来说太短了，她不得不爬下来。