基本解释半四分体同根派生 half-tetrad相关词英汉例句Abnormal development was observed at tetrad and mature embryo sac.在四分体和成熟胚囊时期观察到了异常发育现象。The megaspore mother cell meiosis to form a linear megaspore tetrad.大孢子母细胞减数分裂产生直线形大孢子四分体。half-tetrad更多例句