名词短语
中文翻译：路基拓宽
同义词：
['subgrade expansion', 'subgrade widening例句：1. The construction crew isworking on the widening of the subgrade to improve drainage.（施工队正在对路基进行拓宽，以改善排水。）']
例句：
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1. The construction crew isworking on the widening of the subgrade to improve drainage.
施工队正在对路基进行拓宽，以改善排水。
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2. Thegovernment has announced plans to widen thesubgrade to accommodate more traffic.
政府宣布计划拓宽路基以容纳更多交通。
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3. Theroad was widened to accommodate the growingpopulation and improve safety.
道路被拓宽以适应人口增长和提高安全性。