流体中期前兆异常
Determination methods of anomalies
古生代中期-中生代早期
middle paleozoic early mesozoic
染色体仅出现于前中期的重复
Duplications seen only at prometaphase
染色体仅出现于前中期缺失
Deletions seen only at prometaphase
短期前兆异常
Precursory abnormity of short-term
震前前兆异常特点
characteristics of precursory anomaly
18—19世纪中期英国
Mid-18-19th Century England