In this article the dynamics of insect community in free - pollutant culture apple orchard were investigated from 1999 to 2002 . the orchard was in fugangshanzhuang of houjiazhuang country , neiqiu county which located in the southern of taihang mountain . the results were as followed : 1 twenty species of insects that belonged to 7 orders and 12 families were found in free - pollutant culture apple orchard 于1999 2002年连续对太行山南段的内丘县侯家庄乡富岗山庄无公害栽培苹果园的昆虫群落变化状况进行了调查分析,结果如下: 1无公害栽培苹果园树体上可观察到的昆虫有7个目, 12个科共20种。
Furthermore , analyses of dna sequence datasets with the violation of the homogeneity assumption is not only useful to elucidate the evolutionary mechanisms that have shaped the observed differences in genes and species with atypical substitution process , but also provides important clue for the future development of phylogenetic methods 更进一步地,对于违反同质性假设的dna序列数据集的分析,不仅用于阐明在非典型替代过程下的基因和物种形成的可观察到的差异的进化机制,也为深入研究系统发生的方法提供了重要的线索。
But as some of the participants in this debate have pointed out18 , 22 current efforts to identify reliable short - term precursors to large earthquakes have been largely unsuccessful , suggesting that earthquakes are such a complicated process that reliable ( and observable ) precursors might not exist 但是,如同这场辩论的某些参加者已经指出的那样82 ,目前用以识别大地震的可靠的短期前兆的努力基本上是失败的,从而建议地震是那样复杂的过程使得可靠的以及可观察到的前兆有可能并不存在。 ”