名词
中文翻译：抓挠的横杆
同义词：
['trestle', 'truss', 'tierod']
例句：
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1. The engineer had to fix the trestle before the bridge could be opened.
工程师必须在桥梁开放之前修理横杆。
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2. The construction workers were busy fixing the trestles that held up the bridge.
施工人员忙于修复支撑桥梁的横杆。
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3.The trestles are essential for supporting the weight of the bridge.
横杆对于支撑桥梁的重量至关重要。