sex;gender 階級(jí)、種族和～問題issues of class,race and gender/請(qǐng)注明你的～和出生日期please indicate your sex and date of birth/～比gender ratio;sex ratio/～差異gender differences/～關(guān)系gender relations /～角色gender roles /～歧視sex (or gender)discrimination/變性手術(shù)sex change