常見(jiàn)例句雙語(yǔ)例句All the tree species in shrub layer were contagious distribution.灌木層主要樹(shù)種均呈集群分布。Objective To explore the application of the trend-surface model on geographical distribution of contagious diseases.目的應(yīng)用趨勢(shì)面模型分析傳染性疾病的地理分布趨勢(shì)。When the succession developed to year 2000, the I index of main arbor species declined obviously, but still contagious distribution.在演替進(jìn)行到2000年時(shí)，主要樹(shù)種的I值均明顯降低，但仍均為聚集型空間分布格局。 返回 contagious distribution