不变量

不变量	bù biàn liàng	invariant quantity / invariant (math.)
不	bù	no; not so / (bound form) not; un-
不变	bù biàn	constant / unvarying / (math.) invariant
变	biàn	to change / to become different / to transform / to vary / rebellion
变量	biàn liàng	variable (math.)
量	liáng	to measure
量	liàng	capacity / quantity / amount / to estimate / abbr. for 量词, classifier (in Chinese grammar) / measure word