名词
中文翻译：组截面
同义词：
['group section', 'collective cross-section']
例句：
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1.The group cross-section of the bridge is 20 meters wide.
这座桥的群体截面宽度为20米。
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2. The engineer calculated the group cross-section of the beam to ensure its strength.
工程师计算了梁的群体截面，以确保其强度。
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3.The group cross-section of the new model car is significantly larger than that of the old one.
新款汽车的群体截面比旧款大得多。