名词
中文翻译：次级裂缝
同义词：
['subgrade damage', 'secondary cracking']
例句：
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1.The subgrade lesion caused the road to collapse.
次级裂缝导致道路坍塌。
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2.The engineers were investigating the cause of the subgrade lesion.
工程师们正在调查次级裂缝的原因。
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3. The construction crew was working on fixing the subgrade lesion.
施工队伍正在修复次级裂缝。