形容词是Tetragonal，square

例如

四方的庭院是用石头铺成的，上面露天。The court or quadrangle was stone-paved， and open to the sky.

利用低温超强碱法制备出了纳米四方多晶氧化锆粉体。

The nanometer tetragonal polycrystal zirconia powder was prepared by the super alkaline method at low temperature.