名词
中文翻译：隧道后部同义词
同义词：
['tunnel back', 'tunnel rear']
例句：
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1. The team had to dig atrench back to avoid colliding with the enemy.
队伍不得不挖一条隧道后部，以避免与敌人相撞。
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2.The engineer carefully planned the trenchback to ensure stability.
工程师仔细规划了隧道后部，以确保稳定性。
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3. The soldiers retreated back to their barracks afterthe battle.
战斗结束后，士兵们撤退回营房。