symmetry

蝴蝶翅膀的对称性令人惊叹。

The ___symmetry of a butterfly's wings is truly amazing.

这座建筑的设计在两侧都展现出完美的对称性。

The building's design shows perfect ___symmetry on both sides.

这个图形在垂直中线两侧具有完美的对称性。

This shape has perfect ___symmetry across its vertical center line.