名词
中文翻译：隧道约束
同义词：
['tunnel restriction', 'tunnel constraint']
例句：
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1. The tunnel constraint is causing significant delays in the construction process.
隧道约束导致施工过程严重延误。
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2. The tunnel constraint has limited the amount of space available for exploration.
隧道约束限制了可用空间，从而限制了探索的范围。
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3. The tunnel constraint must be carefully considered when designing the tunnel system.
在设计隧道系统时，必须仔细考虑隧道约束问题。