名词
中文翻译：Unknown
同义词：
['rectangular trench', 'square ditch', 'square channel']
例句：
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1. The engineer designed a square trench to divert the water from the floodplain.
工程师设计了一个方沟，将洪水从冲积平原引走。
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2. The construction crew was working on a square trench to lay the new road.
施工队正在修建一个方沟，铺设新的道路。
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3. The square trench was filled with sand and gravel for drainage purposes.
这个方沟被填充了沙子和砾石，用于排水。