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1.The wall heel is the weakest point of the structure.
墙脚是结构中最薄弱的部分。
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2.The builders had to reinforce the wall heel before they could finish the project.
在完成这个项目之前，建筑者必须加固墙脚。
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3. The engineer used a special material to strengthen the wall heel and prevent further damage.
工程师使用一种特殊的材料来加强墙脚，以防止进一步的损害。