短语词组短語age -group swimming 年齡分組遊泳;分齡遊泳;按年齡分組遊泳pre -recruit age-group 補充前年齡組middle -age group 中年組mid -age group 中年組primary -school-age group 小學學齡兒童high -risk age group 高危年齡段child -bearing age group 生育年齡組 返回 age-group