名词
中文翻译：Unknown
同义词：
['undercut', 'undercutting例句：1. The engineer carefully measured the depth of the underbreak before starting the excavation.（工程师在开始挖掘之前，仔细测量了下破口的深度。）2. The underbreak was a critical part of the construction process.（下破口是施工过程中至关重要的部分。）']
例句：
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1. The engineer carefully measured the depth of the underbreak before starting the excavation.
工程师在开始挖掘之前，仔细测量了下破口的深度。
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2. The underbreak was a critical part of the construction process.
下破口是施工过程中至关重要的部分。
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3. The underbreak had to be repaired before the project could continue.
在下破口修复之前，项目无法继续。