名词
中文翻译：起重机
同义词：
['bridge', 'beam', 'trusses例句：1. The crane girder was used to lift heavy loads from the ground.（起重机用于从地面吊起重物。）']
例句：
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1. The crane girder was used to lift heavy loads from the ground.
起重机用于从地面吊起重物。
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2.The bridge is made of steel girders that span across the river.
这座桥由钢桁架横跨河流建造而成。
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3. The beams of the bridge are reinforced with steel to withstand heavy traffic.
桥梁的梁被加固以承受重交通。