相关单词近义词 natality 出生率, fertility rate 人口出生率, fertility 【C】肥沃, birthrate 出生率临近词Birtha, birth, Birth defects rate, birth-death type, Birth -Year Star, Birth of Aesthetic, birth rate function, birth-death ratio, birth control pills, birthcontrol clinics, birthdate biorhythms, Birth of Maecenas.相似词birth name, birth parent, birth partner, birth pool, birth tourism, birthday, Birthday of Martin Luther King, Jr., birthday party, 返回 birth rate