The pivot row must be selected so that all the other basic variables remain positive.
必须选择枢轴行，以便所有其他基本变量保持正数。
It is quite usual for a slow reader to double and even triple his reading efficiency during a two-day class offering a positive atmosphere, carefully selected texts and comprehension tests.
通过提供积极的气氛，经仔细挑选的文章一级理解力测试，这样一个持续两天的课程将慢速读者的阅读速度提高到原来的两倍甚至三倍，是很常见的。
The examples in the following table have been specially selected as likely to provide an immediate positive experience.
下表中的示例是专门选择的，很可能为您提供及时的正面体验。
They can be positive (such as indicating that the form was submitted successfully) or negative (" the user name you have selected is already taken ").
可能是肯定的(比如提示表单提交成功)，也可能是否定的(“该用户名已被注册”)。
Biggest positive the parameters associated with the lamp power rectifier current, the rated current value of the selected diode should be a peak current in ac bus at least more than 3 times.
最大正向整流电流该参数与灯功率有关，所选二极管的额定电流值至少应是交流母线中峰值电流的3倍以上。
Methods 25 male patients were randomly selected to do plate movement test. 14 patients were positive and 11 patients were negative.
方法随机选择25例男性患者作平板运动试验，其中14例为阳性，11例为阴性。
The positive clones were selected by G418, and highly expressing clones were more selected by flow cytometry, and get stable highly expressing CHO cell lines.
用新霉素类似物(G418)筛选出阳性克隆，并用流式细胞术进一步筛选出高效表达克隆，建立稳定高效表达CHO细胞株。
For the low positive sample, we recommend that a concentration be selected that, upon statistical analysis, would lead to the rejection of an assay run 1 percent of the time.
对于低水平阳性样品，我们推荐根据统计分析来选取可导致检测批出现1%拒绝率的浓度水平。
About 200 positive clones selected randomly were differentially screened, and 29 differentially expressed genes were obtained.
随机挑取约200个阳性克隆进行差异筛选。共获得29个差异片段。
Through differentiation, we selected 24 excellent lines to PCR test. All the lines were positive in PCR.
经选择再分化实验，选择出长势及卡那霉素抗性最优的24个无菌株系，经PCR检测均为阳性。
Selected high quality walnut, give you full of positive energy in the afternoon.
颗颗精挑细选优质坚果，给你满满正能量的下午。
Methods: APP transgenic mice of same age and APP positive control (divided in groups of difference by dosage) were selected to perform water maze and jump platform experiments.
方法：选用同龄转基因APP阳性动物(不同用药组)做水迷宫和跳台实验。
Methods 50 patients examined with CT for wounded and without any positive findings were selected as healthy group, the oblique diameters of lumbar spine were measured.
方法选择5 0名因外伤行CT检查无任何阳性发现的病例作为正常组，测量其腰椎管斜径以得出正常值。
In 2004, the Environmental Protection Agency tested the drinking water on 158 randomly selected passenger planes and found that 20 (12.7%) tested positive for total coliform bacteria.
在2004年，环境保护局对任意抽取的158架客机上的饮用水进行检测，发现有20架(12.7%)大肠菌细菌的总数上合格。
The positive cells were selected by G418, genome DNA of the positive cells was extracted and sequenced.
经g 418筛选阳性细胞，提取阳性细胞的基因组d NA并测序。
STUDY SELECTION: After the above research, the literatures about the relationship of HIV-positive people with exercise and immunity were selected.
资料选择：对资料进行初审，选取关于艾滋病毒感染者与体育运动及免疫关系的文献。
Estonia was selected for the trial because hormone therapy is already established in Finland and physicians have a very positive attitude towards its use. Hormone therapy is still rare in Estonia.
之所以选择爱沙尼亚地区进行研究，是因为芬兰已经开展了激素疗法，医生也喜欢采用这种治疗方法，并且在爱沙尼亚地区激素疗法还很少见。
After two rounds of panning, 21 positive plaques were selected each round at random respectively. ELISA assay was used to examine the immunocompetence of each clone.
每轮随机挑取蓝色噬菌斑各21个，用ELISA方法检测其抗原性，并对其反应性较好的阳性克隆进行测序。
These MBF had shown positive effects on treatment of four kinds of selected wastewater.
它们所产MBF对所选四种废水均有一定的处理效果。
The library was subjected to three rounds of positive and negative cell panning and enrichment and then it was selected by ELISA.
对初级抗体库进行亲和富集及ELISA筛选， 获得的阳性克隆进行免疫组化鉴定并测序。
From all propositions received, a few projects will be selected for funding according to the Resistance Movement protocols and guidelines to achieve the maximum positive effect on humanity.
一旦所有的提案整理完毕之后，我们会依照抵抗运动的拨款准则对雀屏中选的专案进行拨款；以求对人类产生最大的福祉。
Three rounds of biopanning were carried out. The positive clones were randomly selected, detected and sequenced.
随机挑取噬菌体克隆，检测其特异性并进行序列分析；
Three rounds of biopanning were carried out. The positive clones were randomly selected, detected and sequenced.
随机挑取噬菌体克隆，检测其特异性并进行序列分析；
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