查询词典 species

Approximately 600 species of higher plants and more than 200 species of terrestrial vertebrates are endemic to the Qinghai-Tibet Plateau.

约有600余种高等植物、200余种陆栖脊椎动物为青藏高原所特有。

The results obtained in this study are as follows:(1) The result of species analysis shows that Spumellaria was dominant in the more than 190 species identified, and the radiolarian assemblage of the northern area of Okinawa Trough belong to warm-water fauna compared to their available ecology knowledge.

结果表明：（1）初步鉴定190个种，其中泡沫虫目Spumellaria在种和个体数量上占绝对优势，与有关资料对照表明，冲绳海槽北部的放射虫组合属热带大洋暖水动物群。

The present study suggests using length and configuration of radula sac and formation of radula as proper characters for species identification, due to the stability and species specific nature of the characters.

由於齿舌囊的长度与配置以及齿舌的形态具有种内稳定性和种间差异性，本研究认为这两项特徵可以做为物种鉴定的依据。

Rafinesque, in his "New Flora of North America," published in 1836, wrote (p. 6) as follows:"All species might have been varieties once, and many varieties are gradually becoming species by assuming constant and peculiar characters"; but farther on (p. 18) he adds,"except the original types or ancestors of the genus."

拉菲奈斯鸠在他1836年出版的《北美洲新植物志》第六页里写道："一切物种可能曾经一度都是变种，并且很多变种由于呈现固定的和特殊的性状而逐渐变为物种"；但是往下去到了18页他却写道："原始类型、即属的祖先则属例外。"

The relationship between total species and the theoretical rank of the two-dimensional matrix was deduced and it was found that the rank of data matrix was smaller than the total species in sample.

推导了型体总数与两维矩阵的有效秩之间的关系。

Cultural gene ; cultural species ; cultural ecology ; rareness species ; diversity

文化基因；文化物种；文化生态学；珍稀物种；多样性

Sequence comparison and phylogenetic analysis of mtDNA 16S rRNA and COI gene fragments in four species of razor shell were made using PCR and direct sequencing. The four species are Solen grandis Dunker, Solen strictus Gould and Cultellus attenuatus Dunker, Sinonovacula constricta.

本实验对帘蛤目四种蛏类大竹蛏，长竹蛏和小刀蛏和缢蛏的线粒体16S rRNA和COI基因片段部分序列进行了比较并对其系统学进行了初步研究。

Assulta and the induction of GST activity by nicotine and capsicine in H. assulta provided partial supports for the hypothesis that diet breadth was governed by detoxification abilities. The results also indicated that two sibling species had different strategies of adaptation to toxic substances: H. assulta saves expenditure of nutrients and energy by restricting their countermeasures to a few potentially toxic compounds. H. armigera, by contrast, must be prepared to counter a wider range of potential toxins. 5. Compared with parental species, hybrids of reciprocal hybridization had significant difference in feeding preference for hot pepper.

结果显示，广食性的棉铃虫在中肠羧酸酯酶和谷胱甘肽-S-转移酶活性方面高于寡食性的烟青虫，但烟青虫谷胱甘肽-S-转移酶活性可以被寄主植物内的烟碱和辣椒素所诱导，表明解毒酶活性在一定程度上影响着植食性昆虫的食性广度；同时也暗示着二近缘种对有毒的次生物质采取不同的适应策略：烟青虫有选择地对付种类较少的植物次生物质以减轻营养和能量的消耗；棉铃虫则必须对付存在于其寄主植物内的种类繁多的有毒次生物质。

But 34 years on the Endangered Species List and a successful federal reintroduction program begun in 1995 has helped the species recover dramatically.

但是34年来对列入濒危物种名单和成功的联邦的重新引入在1995年开始帮助恢复物种引人注目的。

The site provides significant representation of Australia's biodiversity with ten percent of the vascular flora as well as significant numbers of rare or threatened species, including endemic and evolutionary relict species, such as the Wollemi pine, which have persisted in highly-restricted microsites.

大蓝山地自然保护区内有占世界数量百分之十的维管植物，还有许多珍稀濒危物种，是澳大利亚生物多样性的又一完美体现。该保护区内的珍稀濒危物种包括许多具有当地特色的，堪称"活化石"的进化残遗动植物，比如只在很小的特定区域内可以生存的梧莱米松树。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。