(noun.) something (a term or expression or concept) that has a reciprocal relation to something else; 'risk is the reciprocal of safety'.
(adj.) of or relating to the multiplicative inverse of a quantity or function; 'the reciprocal ratio of a:b is b:a' .
(adj.) concerning each of two or more persons or things; especially given or done in return; 'reciprocal aid'; 'reciprocal trade'; 'mutual respect'; 'reciprocal privileges at other clubs' .
伊丽莎白手打
富兰克林校对