cube capital

例句：

1. 1. The cube has six sides and four corners.
   这个立方体有六个面和四个角。
2. 2. The cube is the same size as the square.
   立方体与正方形一样大。
3. 3. The cube is a useful tool for measuring lengths.
   立方体是测量长度的一种有用的工具。