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This paper consists of three parts: Firstly, we discuss a nonautonomous -species two-patches cooperative Lotka-Volterra diffusion system. Using Brouwer fixed-point theory and Liapunov function, under some conditions, we obtain that the system has a unique globally asymptotically stable positive periodic solution. Secondly, we consider a kind of nonautonomous predator-prey model, in which preys are with stage structure and the predator are with two patches.

中文摘要：本文分三部分讨论三类生态模型周期解或概周期解的存在性及全局渐近稳定性等内容：第一部分讨论了两斑块种群的互惠Lotka-Volterra扩散系统，运用不动点理论和构造Liapunov函数，得到了系统存在唯一一个全局渐近稳定的正周期解的充分条件。

We are determined to obtain our rights at all costs.

我们决心不惜一切代价来获取我们的权利。

We are determined to obtain our right at any cost.

我们决心不惜任何代价争取我们的权利。

We wished to obtain information at first hand.

我们希望能得到第一手情报。

In recent years, the software enterprises of China obtain the development at full speed.

近年来，中国的软件企业取得了飞速的发展。

If we do not do these things, we will be left with two unacceptable choices–(1) relegating crippled and brain-damaged victims of medical negligence to monetary recoveries for their life of suffering that would not even pay for one week of salary of an Enron executive or our president's four years at prep school, or (2) allowing insurance companies to reap profits from good and caring doctors and hospitals in such huge sums that these health care providers will no longer be able to afford to render the type of care that the system should seek to obtain.

如果我们没有做这些事情，我们将只剩下两个令人无法接受的选择，（ 1 ）降级瘫痪和脑损伤的受害者医疗疏忽货币回收率为他们生活的痛苦，甚至不支付一周的工资安然公司执行或我们总统的四年在预备学校，或（ 2 ）允许保险公司获得良好的利润和照顾的医生和医院在这种巨额资金，这些医疗服务提供者将不再能够负担得起，使类型的护理该系统应设法获得。

I don't give much credence to tips obtain ed at second hand.

我对于间接得到的秘密消息不太相信。

Qiu Jier is informed anger of the ten atmolysis when Fuluodu will obtain monetary reward of a huge sum because of acting his: Above all, fuluodu this fellow is too fat; Next, he is too old also.

丘吉尔得知弗洛顿将因扮演自己而获巨额酬金时十分气愤：首先，弗洛顿这家伙太胖了；其次，他也太老了。

The generalized relationship which correlates the geminal coupling constants with the hybrid orbitals, net atomic charges, bond lengths and bond angles had been employed to obtain one concrete relationship for calculation of the geminal coupling constants 2JCaCbH in aromatic systems.

在前文工作的基础上，本文结合MNDO分子轨道方法和最大键级杂化轨道方法研究得到了计算苯及其取代物中孪位偶合常数2JCCH的多元级性关系式。

Inserting the atomic mass number and density into our computational formula ,we obtain the values of the radius of the the metallic atom .

把原子的质量数目和密度代入计算式，我们得到了70 种金属原子半径的值。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。