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An illustration of a huge star cluster in our own Milky Way galaxy.

一个我们银河系巨大星团的例证。

In the antennae galaxies, nearly 50% of the dark object is a young star cluster, each containing tens of thousands of stars.

在触角星系中，近50%的昏暗物体是年轻的恒星群，各自包含数以万计的恒星。

White and his colleagues say this sort of apparent interaction of a star cluster with two separate clouds has never been seen before.

怀特和他的同事说这种星团与两单独云明显交互作用以前从来没有见过。

Objective To study the interrelation of life habit,knowledge and consciousness in preventing infectious disease,and to provide evidence for health education of infectious diseases.Methods A stratified cluster sample of1007college students were questionnaired.

目的 了解学生日常生活习惯、传染病防治知识、防治意识的状况及其相互关系，开展大学生传染病防治健康教育提供依据方法采用分层整群抽样的方法，对广州市1007名大学生进行问卷调查。

Methods A stratified random cluster sample of 17269 students in China were investigated with the children and adolescents' QOL scale according to the census data in 2000, and the urban and country norm of the scale were respectively established.

依据2005年第5次全国人口普查资料，在全国进行多阶段分层整群抽样，分别建立城市和农村2套常模。

If the cluster was made a joint line at the level of 0.533, there were four groups as above motioned subgenera.

如果以0.533处作一接合线，可分为四大类第一类杏、梅，第二类李，第三类樱，第四类含郁李、GF_(655)和桃及近缘种植物。

For this purpose, this paper presents a novel clustering algorithm for these mixed data sets by modifying the common cost function, trace of the within cluster dispersion matrix. The Genetic Algorithm is used to optimize the new cost function to obtain valid clustering result.

为此，该文提出了一种基于GA的模糊聚类新算法，通过改进聚类目标函数将数值特征与类属特征相结合，从而实现具有混合属性特征数据的聚类分析；通过引入GA算法能够快速得到全局最优解，而且不依赖于原型初始化。

Methods Genomic DNAs of 26 trypanosome isolates were amplified by a mobile genetic elements-PCR technique and cluster analysis was performed based on the molecular profiles with Neighbor-Joining method.

目的分析锥虫亚属布氏锥虫、伊氏锥虫和马媾疫锥虫3个种以及布氏锥虫：指名亚种、冈比亚亚种、罗得西亚3个亚种间的遗传变异与进化关系。

Methods A two stage cluster sampling method was adopted to determine the number of entertainment places and CSW. The blood samples testing HIV and syphilis were collected.

采用两阶段整群抽样法确定抽样调查场所和调查人数，并采集血标本检测HIV、梅毒。

The 54 accessions were classified into five major groups:Ⅰ,Ⅱ,Ⅲ,Ⅳ and Ⅴ by cluster analysis using UPGMA, which showed significant relationship with the origin regions of accessions. Genetic differentiation between and within eight eco-geographical groups of C.dactylon was estimated by Shannon's diversity index, which showed that 63.81% genetic variance existed within group, and 36.19 % genetic variance was among groups, indicating rather large genetic distances among those germplasm, and there was a correlation between genetic differentiation and eco-geographical habits among the groups.

聚类分析结果表明，52份材料可聚为5类；基于Shannon多样性指数估算了8个狗牙根生态地理类群内和类群间的遗传分化，类群内的遗传变异占总变异的63.81%，类群间的遗传变异占总变异的36.19%，表明这些抗源材料遗传差异较大，各生态地理类群间的遗传分化与其所处的生态地理环境具有一定的相关性。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。