河蚌育珠 freshwater pearl culture

培育珠 cultured pearl

淡水育珠 to impearl in freshwater

淡水育珠蚌类 Pearly freshwater mussels

珠算教育 soroban education

育种家胚珠 breeder seed

珍珠贝育种规划 Pearl Oyster Breeding scheme ; POBS

珠贝育种规划 Pearl Oyster Breeding scheme

败育胚珠 abortive ovule

胚珠发育 Ovule development