名词
中文翻译：Unknown
同义词：
['隧道填充材料，隧道回填材料例句：1. The construction crew used a mixture of sand and gravel to fill the trench.（施工队用沙子和砾石混合物填充了沟渠。）']
例句：
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1. The construction crew used a mixture of sand and gravel to fill the trench.
施工队用沙子和砾石混合物填充了沟渠。
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2.Trench backfilling is an essential step in the excavation process.
隧道回填是挖掘过程中至关重要的一步。
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3.The engineer carefully planned the trench backfilling to ensure stability during construction.
工程师仔细规划了隧道回填，以确保施工期间的稳定性。