分群

Ever heard of the saying "Birds of the same feather flock together?"

你可曾听过这句谚语"人以类聚，物以群分"？

Eg:the birds of the same feather flock together.

物以群分，人以类聚。

The birds of the same feather flock together.

物以类聚、人以群分

Objective: To study the gene typing methods of Vibrio cholerae O139 by pulsed-field gel electrophoresis.

目的：利用脉冲场凝胶电泳技术探讨O139群霍乱弧菌的分子分型方法。

The particle swarm optimization algorithm was improved using differential eˉ volution and three target velocity equations and was applied to th e linear and negative stiffness model of electrostatic suspension system.

利用基于差分进化联合三目标速度方程改进的粒子群优化算法，分别针对具有线性和负刚度特性的静电支承控制系统模型进行了参数优化设计。

Electrostatic gyroscope ; negative stiffness model ; differential e volution ; PSO

静电陀螺；负刚度模型；差分进化；粒子群优化

The members of the same genus and family were grouped together. The polyogenetic relationships of 8 families were Pyrgomorphidae →Chrotogonidae→Pamphagidae→Oedipodidae→Acrididae→Arcypteridae→Gomphoceridae→Cantantopidae.Pygomorphidae had closer relationships with Chrotogonidae as well as being the most ancestral group. Arcypteridae and Gomphoceridae were the sister groups and had closer relationships with most evolutionary Catantopidae. Tridactylidae was divided firstly as a suborder,which differs from the recent taxonomy distinctly. Haglidae and Gryllidae were grouped into suborder Ensifera, Tetrigidae and 8 families of Acridoidea were grouped into suborder Caelifera, as same as recent taxonomy.

分子系统树表明：科内的属和属内的种均优先聚在一起；蝗总科8科的起源关系为：锥头蝗科→瘤锥蝗科→癞蝗科→斑翅蝗科→剑角蝗科→网翅蝗科和槌角蝗科→斑腿蝗科；锥头蝗科与瘤锥蝗科关系较近，是蝗总科内最原始的类群；槌角蝗科和网翅蝗科互为姐妹群，与最进化的斑腿蝗科关系较近；蚤蝼科为独立的一支，最先分出，似为一个亚目，与现用的分类系统有明显差别；哈螽科和蟋蟀科聚在一起为剑瓣亚目，蚱科和蝗总科的8科组成短瓣亚目，同现用的分类系统。

Abstract］ Objective It is to observe the immunologic effect of spleen aminopeptide oral lyophilized powder on mycoplasma pneumoniae infection.Methods 78 case of MP infection were divided into two groups at random.The control group were treated with routine therapy.The treatment group were treated with spleen aminopeptide oral lyophilized powder based on routine therapy for 20 days.T cell subgroup,immunoglobulin and addiment were determined before and after treatment.

目的 观察脾氨肽口服冻干粉对小儿肺炎支原体感染的疗效及免疫学影响方法 78例MP感染患儿随机分两组，对照组38例予以常规治疗，观察组40例在常规治疗的基础上予以脾氨肽口服冻干粉治疗，治疗后分别测定患儿T细胞亚群、免疫球蛋白及补体等变化情况。

Locusts, some caterpillars, castes of social insects, alary polymorphism in crickets, aphids and other Homoptera, and color polymorphism of butterflies are examples of insect polymorphism.

同一性别昆虫，还可分化成具有不同形态和生殖机能的，或在其&家族&中负担不同职能的个体群。蚂蚁、白蚁、蜜蜂等社会性昆虫，除雌雄二型外，还有职蚁和职蜂。

There are some tidal current-induced allochthonous forms e.

北部海岸带埋葬群的特点是分异度较低，而海湾浅海区较高。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了