Middle school students sample included two population, superior grade and inferior grade.
其中，初中生群体又包括快班和慢班两个小的被试群体。
The measurements and morphological description of two population of this nematode were given.
对此线虫两个群体进行了形态学测量和描述。
This tool is used to test the null hypothesis that there is no difference between two population means against either one-sided or two-sided alternative hypotheses.
此工具用于检验两个总体平均值之间不存在差异的空值假设，而不是单方或双方的其他假设。
The z-Test tool can also be used for the case where the null hypothesis is that there is a specific nonzero value for the difference between the two population means.
检验工具还可用于当两个总体平均值之间的差异具有特定非零值的空值假设的情况。
Two population breeding methods of "micro-law of insect cage" and "whole-petri dish" were designed and evaluated, more convenient and practical of the latter in the practical operation.
设计并评价了种群繁殖和实验过程中的两种接虫方法：“微型接虫笼法”和“整株一培养皿”结合法，后者在实际操作中更加便捷和实用；
Two population studies also found that Asia women with early-stage breast cancer (stage one and stage two) who drank three to five cups of green tea per day didn't have as many RECURRENCES.
对亚洲两成女性的调查发现那些每天喝3- 5杯绿茶的早期乳腺癌患者(阶段一和阶段二)不容易出现复发症。
The Daphnia magna of the two population has obvious around-the clock ingestion rhythm, the morning and the evening are two peaks of ingestion. Salinity has no influence on the ingestion rhythm.
二个种群的大型溞具有明显的昼夜摄食节律，早晨和傍晚为两个摄食高峰期，盐度对摄食节律无影响。
If two flying insect populations took up residence in separate nearby valleys, chances are that individuals from each population would fly back and forth, continuing gene flow.
如果有两个飞行昆虫种群居住在相距不远的不同山谷中，那么任一种群中的个体都有可能来回飞行，从而使基因流动继续。
To stabilize its population—discounting immigration—women must have an average of two children.
为了稳定人口——减轻移民的影响——妇女必须平均生育两个孩子。
Before the arrival of Europeans, the islands in the two largest cultural areas, Polynesia and Micronesia, together contained a population estimated at 700,000.
在欧洲人到来之前，波利尼西亚和密克罗尼西亚这两个最大的文化区，住着大约70万人。
Once the hare population has declined, it takes two to three years for the quantity of twigs to recover.
一旦野兔数量减少，嫩枝的数量需要两到三年的时间来恢复。
There are two other kinds of research that have thrown some light on the origins of the Native American population; they involve the study of teeth and of languages.
还有另外两种研究对印第安人的起源提供了一些线索；它们包括对牙齿和语言的研究。
The chipmunk population increased strikingly due to two successive years of abundant acorn crops in the forest.
金花鼠数量显著地增加，是因为森林里连续两年丰硕的橡子收成。
With the opening of the two-child policy, the population of China will become larger.
随着二孩政策的开放，中国的人口将会变得更多。
The tragedy surrounding those two storms underline just how maladapted major population centers in the region are to today's conditions.
从那两场灾难就可以看出该地区主要人口密集区与当前环境的强烈不适。
Two-thirds of Calcutta's population live in the bustees.
加尔各答三分之二的人口住在贫民窟。
Slovenia, whose population of two million is about half that of Ireland, will be at the finals for a second time.
斯洛文尼亚拥有两百万人口，相当于爱尔兰的一半，这是他们第二次进军世界杯决赛阶段。
Even if each of those women has only two children, population will coast upward under its own momentum for another quartercentury.
即使每位妇女只要两个孩子，人口也会根据自己的势头再向上升二十五年。
Thus, large Numbers of coin hoards are a good quantitative indicator of population decline, two researchers argue in in the Proceedings of the National Academy of Science Monday.
因此，大量的钱币窖藏是人口减少的风向标，两位研究人员在《国家科学院科学星期一公报》上就此发表了一些看法。
Two-thirds of the rural population remains poor.
三分之二的农村人口生活在贫困线以下。
Janet K. Swim, professor of psychology, Penn State, and her colleagues report that growing consumption and growing population are two significant contributors to human impact on the environment.
心理学教授简尼特k斯维姆和她的同事作的报告称，不断增加的消耗和不断上升的人口数量是人类对环境产生的两个重要影响因素。
Some 231m Indonesians account for two-fifths of the population of ASEAN, the ten-country Association of South-East Asian Nations.
东南亚国家联盟由十个国家组成，而印尼人口约2.31亿，占东盟的五分之二。
Some 2.5 billion people – two fifths of the world's population – are now at risk from dengue.
占世界人口五分之二的约25亿人面临罹患登革热危险。
They make up about two percent of the population, but suffer disproportionately high rates of ill-health, imprisonment and unemployment.
原住民大约占澳大利亚人口的2%，但这些族群出现的健康问题，被关押率以及失业率都不成比例地高于其它人群。
Japan, Europe and Russia could lose between one-half and two-thirds of their population by 2100.
在2100年前，日本、欧洲和俄罗斯的人口，可能会减少二分之一至三分之二。
Japan, Europe and Russia could lose between one-half and two-thirds of their population by 2100.
在2100年前，日本、欧洲和俄罗斯的人口，可能会减少二分之一至三分之二。
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