数量的

A predator model with refuge and toxicity is studied. By constructing a suitable Dulac function, it is shown that there is no limit cycle in the first quadrant, thus the globally stability of the equilibrium is proved. Further more, the paper analyzes the influence of refuge, toxicity and harvesting. It is amazing that ① if the death rate of predator is big or the harvesting effort is big, the existence of the predator is unrelated with refuge; if the death rate of predator and the harvesting effort are small, and the refuge is small enough, the population of both species is increased as the increase of refuge;② if d2=0, the increase of d1 has no influence on the prey population, while the population of predator is decreased.

研究一类有避难所、毒素作用和外界捕获影响的捕食系统，通过构造恰当的Dulac函数，证明系统在第一象限没有极限环，从而证明了平衡点的全局稳定性；分析了避难所、毒素、捕获作用对该系统最终种群数量的影响，发现：①当捕食者的死亡率大或其被捕获得多时，两种群的绝灭与避难所的存在无关；当捕食者的死亡率小、被捕获得多且避难所足够小时，随着食饵避难所的增加，捕食者种群数量也随之增加；②当毒素d2=0时，毒素d1的增加对食饵种群最终数量没有影响，而使捕食者种群数量下降。

Expressed or expressible as a quantity.

用数量表示的：用数量表示的或可表示成数量的

The biomass of trematode worms, also called flukes, was three to nine times that of the marshes' birds--and about on par with that of the fish and burrowing shrimp .

吸虫的数量是沼泽地鸟类数量的3至9倍，大约跟鱼类和大蝼蛄虾的数量等同。

Based on the capacity of affirming quantity, younger infants are sensitive to number which is the jumping-off point for them acquiring rich preverbal quantitative knowledge. In the early of preschool period, children construct many types of schemas, later they attain the concept of quantity conservation. Besides this conceptual knowledge, children's cognitive skills such as counting also develop rapidly.

基于天赋的"快速确认"数量的能力，较小的婴儿对数字就很敏感，以此为起点他们获得了丰富的前语言的数量知识；在幼儿早期建构了多种数量图式，到幼儿期末形成了数量守恒概念；除了这些概念性知识之外，儿童的数数等认知技能在幼儿到小学初期也获得了发展。

"As the contract is carried out, the quantities actually used are measured by a quantity surveyor and the contractor is paid on the basis of these amounts."

在合同履行中，实际使用数量由数量测算员加以衡量，并在这些数量的基础上确定对承包商的付款。

The Markov forecast model, time series method (triple exponential smoothing method and a combined of triple exponential smoothing method and Markov model) and stepwise regression forecast method were choosed, and the basic principles and processes of the three models were analyzed and compared. Based on above, the three methods were used to predict population dynamic of Cricetulus barabansis and Meriones unguiculatus. The characteristic, accuracy and applicability of three methods were analysed and compared. The results showed that,(1) Markov model belongs to a middle-long time forecast model, and the result was interval forecast, but it reached the requirement of forecasting the harmful population dynamic of rodents. Through the forecasted population dynamic of Cricetulus barabansis and Meriones unguiculatus in 2004, the results were accurate; this meant that Markov model was a good forecast model to Cricetulus barabansis and Meriones unguiculatus population.

选择马尔可夫链预测模型、时间序列分析法(三次指数平滑法、三次指数平滑法和马尔可夫链预测模型的组合预测法)和逐步回归预测法，对这三种模型的基本原理、模型的构建过程进行对比分析，在此基础上用此三种方法预测了黑线仓鼠和长爪沙鼠的种群数量，并对三种方法的特点、预测的准确度和适用范围进行了比较分析，结果表明：(1)马尔可夫链预测模型属于中长期预测，预测的结果为区间预测，但对于害鼠种群数量的预测来说已经达到要求，通过对2004年黑线仓鼠和长爪沙鼠种群数量的预测，预测的结果都比较准确，这说明对于预测黑线仓鼠和长爪沙鼠种群的数量动态，马尔可夫链模型是比较好的模型。

Please offer 1% more ullage than the ordered quantities,please pack the ullage separately,thank you.

请提供所订物品数量的1%的预补数量；预补数量需另外包装

First, in view of a question our supposition newborn babys quantity is , then through to various ages stages survival percentage , the animal quantity which as well as this animals overall quantity analysis moves away establishes this community the dynamic change model , uses in this community near two years various ages stage individual quantity distribution which moves away, with the C language programming computation, extrapolates the current this animals age structure.

首先，针对问题一我们假设新生幼仔的数量为，然后通过对各年龄阶段的存活率、被运走的动物数量以及该动物的总体数量的分析来建立该群落的动态变化模型，利用该群落近两年内被运走的各年龄阶段的个体数量分布，用C语言编程计算，推测出当前该动物的年龄结构。

The research employed nylon bag implantation and in vitro fermentation techniques. With the procession of in vitro fermentation, anaerobic fungal population density in the cultures were shown to increase, with the largest fungal populations growing on ryegrass leaves, ryegrass stem and straw occurring after 48 h of incubation.

结果表明，随体外发酵的进行，真菌数量逐渐增加，以黑麦草叶、黑麦草茎、稻草秸为底物时，瘤胃真菌数量均在48 h达到最大值，且真菌数量的最大值随底物木质素含量的上升呈下降趋势。

"Very limited , we are sending a set amount to each retailer that qualified, there are not that many at all, no need to convince anyone,they would rank as some of the rarest berties."

数量非常有限，我们只给每个达到要求的零售商配送了固定数量的零售限定版，数量不多。他们会是最稀有的几个Bertie。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。