symmetry
/ˈsɪmətrɪ; `sɪmɪtrɪ/ n[U]
1 exact match in size and shape between the two halves of sth 对称
the perfect symmetry of the building 这座建筑物完美的对称格局.
2 pleasingly regular way in which parts are arranged 匀称
the symmetry of her features 她的五官端正.