查询词典 retention

Results: The RSD of retention time of the target components was not more than 0.48%, and the limits of detection were within 0.1~0.9 ng. Caffeine, phenolphthalein and sibutramine were detected in 20 of the total 29 samples.

结果：各被测组分保留时间的RSD不超过0.48%(n=7)；最低检测限为0.1~1.9ng；在29批供试样品的20批中检测到咖啡因、酚酞和西布曲明。

A mathod of obtaining the retention time, dimention and number density of little bubbles by underwater high-speed photomicrography technique is introduced.

本文提出了一种用水下高速显微摄影技术来获取小气泡在水中的滞留时间、尺度和数密度等重要参数的方法。

One of the few soils that the phylloxera louse does not thrive in, the soil drain wells but does not have good water retention.

是根瘤蚜虫不能大规模繁殖的极少数土壤之一，排水了非常好，但保水能力不足。

To research the water retention performance of lowland heightening farmland protection project in Tingzikou Water Control Pivot, large-scale soil column experiments and one-dimensional saturated-unsaturated flow simulations have been performed.

针对亭子口水利枢纽农田防护工程低地垫高方案的保水性能，在室内大型土柱试验的基础上，建立基于Richards方程的一维饱和-非饱和水流运动数学模型，模拟分析不同防护方案条件下土壤水分的运动过程和保水性能。

Characteristics can not fly; legs was born in the most lower body, it was upright posture; toes webbed; plantigrade sex; forelimbs into flippers; feathers short, in order to reduce friction and turbulence; retention layer of air between the feathers for insulation .

特征为不能飞翔；脚生于身体最下部，故呈直立姿势；趾间有蹼；跖行性；前肢成鳍状；羽毛短，以减少摩擦和湍流；羽毛间存留一层空气，用以绝热。

Then hemorrhage of puncturing site, postoperative compression time of puncture point, incidence of postoperative urine retention and one time achievement ratio of artery puncture of the two group cases were observed and compared.

观察并比较两组病人穿刺部位出血情况、术后穿刺点压迫时间、术后尿潴留发生率、一次动脉穿刺成功率。

The present research elaborates an appropriate condition for production of allotriploid zebrafish by using heat shock with the retention of the second polar body.

本研究分析了热休克处理的参数与三倍体出现率和胚胎相对存活率的关系，并得出诱导参数中起始休克时间为重要因素，其次为持续时间和休克温度。

The quantitative structure retention relationships of the Alkylnitrophenols on different polar stationary phases were set by the Genetic Algorithms method.

利用分子力学和量子化学方法计算出烷基硝基苯酚类化合物的分子结构描述参数，用遗传算法建立化合物在不同极性色谱柱上的QSRR模型。

Solute-related parameters were computed by means of AM1 method, the quantitative structure-chromatographic retention relationship of the hydrocarbons on different polar stationary phases was set with stepwise regression method.

运用量子化学中的AM1方法计算烃类化合物的分子结构描述参数，借助逐步回归法建立了烃类化合物在不同极性色谱柱上的QSRR模型。

How to provide the effective strategy of teaching meanings will contribute to the guessing and retention of the figurative senses of polysemous words.

因此，如何提供有效的词义教学策略将有助于大学生对多义词比喻意义的猜测和学习。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。