flat end

例句：

1. 1.The car has a flat end on the back.
   这辆车后部有一个平底端。
2. 2.The flat end of the table is smooth and easy to clean.
   桌子平底端的材质光滑且易于清洁。
3. 3. The flat end of the hammer helps to strike the nail.
   锤子的平底端有助于敲打钉子。