数量的

According to the change of the enemy\'s quantity and the qualitative theory of the differential equation, we research the spruce aphides and its predator system. At the same time, we discussion the spruce aphid multiplication model when the natural enemy quantity is a certain value and the periodic oscillating model whose the quantity of the natural enemy changes along with the time. Obtains the stability condition of the balance point and the limit-cycle existing condition, the system presents the dissipative structure\'s character. Finally it explains that this theoretical analysis has certain practical significance regarding the preventing and controlling harmful insect.

第五章，松毛虫与其天敌的关系是食饵和捕食者的关系，根据天敌数量的变化，利用微分方程定性理论，研究松毛虫与天敌系统，讨论天敌数量为一定时的松毛虫增殖模型和天敌数量随时间变化的周期振荡模型，得到正平衡点全局稳定性和极限环的存在条件，通过计算机模拟，说明周期振荡的捕食模型能够呈现典型的时间耗散结构特征，对于防治害虫有一定的实际意义。

Can accelerate the bone marrow cell from G1 phase into S phase when we measure it's Cell cycle, it make S phase rate was increased .thus it promoted DNA synthesize and repaired. Mice irradiated at dose of 5.5 Gy gamma-irradiation showed timed-related decreases and restores in peripheral blood picture at day 1 through day 21, the counts of WBC of these group had taken drug has various degree to increase than irradiation control group in day 1. Grugs failed to protected the peripheral blood cell at lowest point, but seems promote their rescovery.9803 treated group was distinct. At 7days after mice were radiated in 3.5 Gy. we observed drug can Significantly hold back the decreased number of hematopoietic progenitors colony forming radiation induced. These findings indicated 9803 have a certain radioprotective activity against gammer irradiation in mice.

给药组的 CFU-S 数量较照射对照组明显增加，3.5Gy 照后第七天观察给药9803组对小鼠骨髓造血组细胞集落生成能力的影响，给药组的造血祖细胞集落的形成能力强于照射对照组，并且9803组明显优于523组。5.5Gy 照射引起的小鼠的外周血细胞数量的降低以 WBC 发生最早，照后24小时给药组的 WBC 数量均比照射对照组有不同程度的升高，以9803各给药组最为明显，药物未能使照射引起的外周血细胞最低值升高，而有降低的趋势，但给药对照射后期外周血象的总体恢复有较好的促进作用。7.5Gy 照射后第七天测定小鼠骨髓细胞周期的测定中发现9803具有促进骨髓细胞由 G1期进入 S 期的效应，致使 G0/G1期细胞显著减少， S 期细胞比率显著增加，这利于促进 DNA 合成修复，即促进骨髓细胞增殖，骨髓细胞 DNA 含量给药组显著高于照射对照组。

Bt cotton and corn may affect natural enemies indirectly by decreasing the population of lepidopteran insects that serve as hosts of parasitoids or predators. Population densities of predators in Bt fields were significantly higher than those in non-Bt fields treated with insecticides for control of target pests.

杀虫剂用量的减少，降低了对天敌的杀伤力，Bt田中捕食性天敌的种类和数量均显著高于常规施药田；但Bt田内靶标害虫数量的减少和质量的降低，在一定程度上影响了寄生性天敌的种类和数量。

Show according to concerning data, china's current netizen measure had exceeded 210 million, among them, from March 2008 since, the quantitative mushroom of user of Olympic Games channel, end in June, user of Olympic Games channel is adjacent 70 million, held the 1/3 of whole netizen amount, more interesting is, the net witenagemot of 98.86% knows the news related to the Olympic Games through the network.

根据有关数据显示，中国现在的网民数量已经超过了2.1亿，其中，从2008年3月以来，奥运频道用户的数量迅速增加，截止到6月，奥运频道用户接近7000万，占据了整个网民数量的1/3，更有趣的是，98.86%的网民会通过网络来了解和奥运相关的信息。

Copepoda have 1 genus, 1 classes and the average quantity is 23.7cells/L, 0.7% of total.

桡足类1属1种，平均数量为23.7个／L，占总数量的0.70%。

This large quantity corresponds to about a quarter of Terna's current need for enlarging the grid.

这一批数量相当于Terna公司目前为扩大电网所需数量的四分之一。

In order to make reasonable and effective use of slag in concrete, effects of slag admixing quantity on the slag utilization in the system, quantity and gradients of hydrated products are analyzed on the base of measuring the reaction extents of slag in slag-cement system with different admixing quantities and amounts of Ca2 and non-evaporable water.

为使矿渣在混凝土中得到合理有效利用，在测定不同矿渣掺量的矿渣-水泥体系中矿渣反应程度、Ca2与非蒸发水数量的基础上，分析矿渣掺量对体系中矿渣的利用效率、水化产物的数量与构成的影响，认为存在一个合适的掺量范围，使体系中矿渣具有较高的利用效率而体系水化产物数量及构成合理，保证材料具有良好的性能。

In order to make reasonable and effective use of slag in concrete, effects of slag admixing quantity on the slag utilization in the system, quantity and gradients of hydrated products are analyzed on the base of measuring the reaction extents of slag in slag-cement system with different admixing quantities and amounts of Ca2 and non-evaporable water. It is believed that there exists an appropriate admixture scope that enables the slag to be utilized efficiently in the system with reasonable amount and gradients of hydrated products and ensures the material has a good performance.

为使矿渣在混凝土中得到合理有效利用，在测定不同矿渣掺量的矿渣-水泥体系中矿渣反应程度、Ca2与非蒸发水数量的基础上，分析矿渣掺量对体系中矿渣的利用效率、水化产物的数量与构成的影响，认为存在一个合适的掺量范围，使体系中矿渣具有较高的利用效率而体系水化产物数量及构成合理，保证材料具有良好的性能。

The number of cotton aphid from April to October in 1990 was investigated, and then trend analysis and periodic analysis were made with lab's data.

于1990-04~10对大田棉蚜种群数量进行调查统计，对棉蚜种群数量的周期性及趋势性进行分析。

The purpose of this study is to find out major factors that influence the delivered numbers of new-built ship in marine market.

本研究主要在探讨海运市场中影响新建造船舶数量的因素，根据船舶吨位供给与海运市场需求之供需理论，寻找并归纳可能影响新造船舶数量之因素。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。