短語(yǔ)詞組短語(yǔ)occurrent state 賦存狀態(tài)occurrent regularity 發(fā)生規(guī)律occurrent date 發(fā)生期預(yù)測(cè)occurrent characterastics 發(fā)生特征occurrent category 發(fā)生分類occurrent time 發(fā)病時(shí)期 返回 occurrent