常見例句Abnormal development was observed at tetrad and mature embryo sac.在四分體和成熟胚囊時期觀察到了異常發(fā)育現(xiàn)象。The megaspore mother cell meiosis to form a linear megaspore tetrad.大孢子母細胞減數(shù)分裂產生直線形大孢子四分體。 返回 half-tetrad