square centimeter

例句：

1. 1. The table issquare and has four legs.
   这张桌子是正方形的，有四条腿。
2. 2. The roomis square, so it's easyto move around in.
   房间是正方形的，所以很容易在里面移动。
3. 3. Thesquare of a number isthe amount of change you getwhen you multiply that numberby itself.
   一个数的平方是当你把这个数乘以它自己时得到的金额。