多足动物

Studies on Systematics of Collembola Collembola belongs to Arthropoda, Hexapoda. It is the most aboundace and cosmopolitan groups of the basal Hexapoda. 686 genera and 7895 species belongs to this class have been reported now from all over the world.

弹尾纲系统分类学研究弹尾纲Collembola，隶属于节肢动物门Arthropoda，六足总纲Hexapoda，是低等六足动物中种类最多、分布最广的一个类群。

The tarsal joint of the hind leg of a digitigrade quadruped,such as a horse, corresponding to the human ankle but bending in the opposite direction.

跗关节马等跗行四足动物后腿的跗关节，与人类的踝关节类似但弯曲方向相反溴的衍生物的活性要比相应的氯的衍生物大得多。

One of the paired, flexible, segmented sensory appendages on the head of an insect, a myriapod, or a crustacean functioning primarily as an organ of touch.

触角，触须昆虫、多足纲节肢动物或甲壳类动物头部的一对灵活的管状感觉器官之一，主要为触觉器官

One of the paired,flexible,segmented sensory appendage s on the head of an insect,a myriapod,or a crustacean functioning primarily as an organ of touch.

触角，触须昆虫、多足纲节肢动物或甲壳类动物头部的一对灵活的管状感觉器官之一，主要为触觉器官

Zoology One of the paired, flexible, segmented sensory appendages on the head of an insect, a myriapod, or a crustacean functioning primarily as an organ of touch.

触角，触须：昆虫、多足纲节肢动物或甲壳类动物头部的一对灵活的管状感觉器官之一，主要为触觉器官

Research on the diversity of shape and structure of avian tarsometatarsus,not only did it present evidences to realize the ecological habit of birds of different species,but made the knowledge of functional behavior of avian hindlimbs perfect progressively also.

不同类型鸟类跗跖骨的形态多样性分异反映了鸟类对外界环境的选择性适应。1鸟类跗跖骨的特征1·1鸟类跗跖骨的组构在鸟类后肢骨骼系统中，其下端的跗跖骨为一块愈合完整的骨骼，这亦成为鸟类特有的骨骼结构，与其他四足动物(跗骨、跖骨由多块分离的骨骼组成)明显不同，鸟类由于飞行使得

From Chaotianmen to Zigui,the Shannon-Weaver diversity index of phytoplankton changes undeely.4 the impact of sediment deposition on zooplankton in the waters studiedAccording to the results of the experiment, we had learnt that the species composition of zooplankton sampled had the same tendence-the species was from less to more, and the biomass was also gradually increasing. Particularly Copepoda had increased significantly in the type and quantity. The main of zooplankton at each sampling situs were protozoa and rotifers.

朝天门江段到秭归江段的浮游植物的Shannon-Weaver多样性指数呈波浪式变化，整体有下降趋势。4研究水域泥沙沉降对浮游动物的影响从本次实验的结果来看，四次采样浮游动物种类组成都有同一个趋势：种类由少到多，生物量也逐渐增大，特别是桡足类在种类和数量上都增加明显，各采样点的浮游动物以原生动物和轮虫为主。

Five water sampling collected from Miyun Reservoir were observed quantitatively. Thirty-six species of zooplankton including 11 protozoan, 15 rotifers,6 cladocero and 4 copepoda were found. The results showed the eutrophicational feature, such as lower biodiversity ,miniaturization and more amount.

浮游动物共检出4门，30属，36种；浮游动物群落具有原生动物数量多，轮虫次之，枝角类与桡足类量少的特点，呈现出浮游动物数量大、小型化、多样性低等伴随水体富营养化出现的特征。

Scientists are uncovering more and more ancient hominids all the time -- here meaning bipeds including humans, our direct ancestors and closest relatives.

一直以来科学家们向我们揭示了越来越多古老的原始人类--这就意味着这些两足动物中包含有人类的直系祖先与最接近的亲属。

How unlikely, that a short-lived biped on a two-bit planet should be able to gauge the speed of light, lay bare the structure of an atom, or calculate the gravitational tug of a black hole.

一个微不足道的行星上的短命两足动物居然能测出光速、揭示原子结构、计算黑洞的重力作用，多难以置信！

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。