短語詞組短語fish population genetic structure 魚類種群遺傳結(jié)構(gòu)population dynamic structure 群體動態(tài)結(jié)構(gòu)population canopy structure 群體冠層結(jié)構(gòu)population natural structure 人口自然結(jié)構(gòu)population sex structure 人口性別結(jié)構(gòu)Population age structure index 率population profession structure 人口職業(yè)結(jié)構(gòu)human population genetic structure 人類群體遺傳結(jié)構(gòu)population n structure 人口結(jié)構(gòu) 返回 population structure