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A program with a single loop and a nested loop (presumably loops that execute N times each) is O( N 2 ), even though there is also a O loop present.

程序的单回路和一个嵌套循环（大概循环每执行 N 次）为O （ N 2 ），即使有也是一个为O环本。

However, among students in the elementary schools (n=552), the prevalence of myopia was 22.5%(25/111) in the darkness group, 23.1%(94/427) in the night-light group, and 21.4%(3/14) in the room-light group. Among children in the kindergartens (n=352), the prevalence of myopia was 6.1%(2/33), 13.5%(40/297), and 9.1%(2/22), respectively.

但是在学校组中，国小学童(n=552)的近视罹患率，全暗组为22.5%(25/111)，小灯组为23.1%(94/427)，全亮组为21.4%(3/14)；幼稚园学童(n=352)的近视罹患率，全暗组为6.1%(2/33)，小灯组为13.5%(40/297)，全亮组为9.1%(2/22)；均无统计学显著差异。

N\nPlease verify that your email address is correct\nin your Mail preferences and try again.

n\n请验证您「邮件」喜好设定中的\n电子邮件位址正确无误，然后再试一次。

The relationship between soil microbial number and organic matter, total N, available N, and available P of soil samples, and the ecological effect of soil microbial physiological community participating nitrogen cycle in this area were also discussed.

同时讨论了土壤微生物数量与土壤有机质、全N、有效N和速效P的相关性及微生物生理群在该场区氮循环中的生态作用。

The remaining three groups were given a chemical, N-butyl-N-(4-hydroxybutyl) nitrosamine in drinking water, which induces bladder cancer.

其余三组则获得化学， N -丁基的N -（ 4 -羟基）亚硝胺在饮用水，诱发膀胱癌。

METHODS: By cluster sampling, 214 cadets from a military academy were investigated with Modified Big Five Personality Scale and selfdesigned decisionmaking scale. The cadets were randomly divided into 2 groups. After noneffective questionnaires were eliminated, the first group (n=110) were in a positive framing and the second group (n=104) in a negative framing. A chisquare test was used to analyze the results of program chosen and t test was used to determine the relationship between personality dimension and risky choice.

采用自编决策问题问卷和大五人格量表中国修订版，以整群抽样的方法，抽取某军校大学生220人为研究对象，随机分为两组，剔除无效问卷后，正面框架组(n=110)，负面框架组(n=104)，对两组间被试的方案选择进行χ2检验，方案选择与人格特征的关系进行t检验。

The new water-soluble reagent N―Nonyl―N＇―Sodium p-Aminobenzenesulfonate Thiourea NPT was synthesized and its structure was confirmed by elemental analysis,IR, UV and1 HNMR spectra.

合成了水溶性的新试剂N―壬基―N＇―氨基对苯磺酸钠硫脲NPT，经元素分析、IR、UV、1HNMR测试，确定了其结构。

N, N-Dimethylformamide is a kind of organic solvent with low noxiousness.

中文摘要：二甲基甲酰胺(N，N-dimethylformamide，DMF)是一种低毒类有机溶剂，主要应用于萃取、有机合成、染料、纤维、皮革、制药等工业。

It is worthy to mention that the extracted nucleon density distributions of 〓N and 〓N by this method are not sensitive to the model parameter.

值得指出的是，用本文方法提取的〓N、〓N核子密度分布，对所用理论模型参数十分不灵敏。

In order to test our model, we also give an analysis of the lowest excited states N*(1520) and N*(1535) of nucleon. with negtive parity.

为了进一步检验我们的模型，本文还在推广的手征SU(3)夸克模型下计算了核子最低负宇称激发态N~*(1535)，N~*(1520)的能量。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。