短語詞組短語alternation u of generations 世代交替alternation E of generations 世代交替heteromorphic alternation of generations 異形世代交替isomorphic alternation of generations 同形世代交替antithetic alternation of generations [植]異源世代交替homologous alternation of generations [植]同源世代交替homophasic alternation of generations 同核相世代交替secondary alternation of generations 次級世代交替alternation of basin generations 盆地世代更疊 返回 alternation of generations