名词
中文翻译：山谷挖掘
同义词：
['valley excavation', 'valley tunneling']
例句：
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1.The engineers are planning to create a new valley trenching project in the area.
工程师们计划在该地区创建一个新的山谷挖掘项目。
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2. The construction of the valley trenching system will require significant resources and time.
山谷挖掘系统的建设将需要大量的资源和时间。
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3. The team successfully completed the valley trenching project, which greatly improved the local transportation network.
团队成功地完成了山谷挖掘项目，这极大地改善了当地的交通网络。