不變,不變性
Immutability \Im*mu`ta*bil"i*ty\, n. [L. immutabilitas: cf. F. immutabilit['e].] The state or quality of being immutable; immutableness. --Heb. vi. 17.
immutability n : the quality of being incapable of mutation; "Darwin challenged the fixity of species" [syn: {immutableness}, {fixity}] [ant: {mutability}, {mutability}]