使不变

In collaboration with apple breeders at the Department of Agriculture and Food in Western Australia, the scientists were able to show that fruit colour can be predicted even in seedling apple plants by measuring the form of this gene that is present.

苹果的颜色依赖于光照，苹果在暗处生长或甚至是严重的遮盖都会使其在成熟时不变红，Walker博士根据这个发现了这个基因在青苹果中没有在红苹果中表达多。

Using the optimized integral induction heater and keeping the volume of the Fe-based alloy micro molten pool almost invariant by feeding continuously, glass-coated Fe-based alloy microwires are fabricated continuously and stably.

采用结构优化的整体感应加热器，并通过连续进料使微熔池的体积保持基本不变，实现了玻璃包覆铁基合金微丝的连续稳定制备。

To make a comprehensive view of metapopulation researches, we folly analyze and summarize the present concepts, theories and models of metapopulation in this paper, which primarily includes the dynamical models and simulation approaches of single and competitive metapopulations. Based on the Levin's patch occupant model, the center framework of metapopulation researches, primary principles and mechanisms are discussed. First, Levins rule: the fraction of empty patch will remain constant with habitat destruction as long as metapopulation survives. This rule implies that empty patches have determinant effects on persistence and conservation. Second. Allee effect of metapopulation is incurred by establishing difficulties and dispersal costs, which is important to the studies of reserve area and the minimum available metapopulation size. Third, we analyze the rescue effect that immigrants can reduce the extinction risk of the presented local population. Rescue effect can leads to the improvement of metapopulation sustainability and the decrease of fraction of empty patches. Fourth, the coexistence mechanism of two competing metapopulation is discussed, which suggests that competition-colonization trade off may be prevalent in competing systems. Finally, extinction debt ob tamed from coexistence mechanism is given, which depicts the lost of species richness in the future for the current habitat destruction. After theoretical discussion, we present two popular simulated approaches in metapopulations: probability transition model and stochastic process model.

为了能总观集合种群进展的全局并开展进一步的工作，首先对集合种群的已有概念、理论和模型做了全面的分析和总结；其次对集合种群的发展和概念进行了探讨，以集合种群模型的中心框架：Levins的斑块占据模型为基础，展开对其它原理、效应和机制的探讨；主要包括了Levins原理，即当生境进到破坏时，空斑块比例在集合种群灭绝前保持不变，然后还分析了Allee效应（集合种群的Allee效应主要是由于建群困难和扩散损失造成的）；第三，分析了援救效应：迁人个体可以降低斑块中现有局域种群的灭绝风险，援救效应会增强集合种群的生存力，使空斑块比例下降第四，探讨了两竞争集合种群的共存机制，即竞争－侵占妥协，其共存机制为空间生境中物种共存提供了有力的理论解释。

I have eczema, and usually cannot have lotions touch the skin without it becoming worse.

我有湿疹，基本上不能用任何乳液的，那样会使皮肤变的更糟。

However if h is allowed to evolve freely to maintain a constant number of neighbours in SPH summations , such unwanted effects can be avoided and accuracy improved .

若随时调整h的值使得SPH方法计算粒子的邻近粒子数总和保持不变，则可以避免这种有害的影响，使准确性得到提高。

In this way can develop the country economy,improve humanbeing's life.meanwhile,it can increase employment.while,there are some different voice,at one hand ,the rodes will become crowd even a traffic jam,what's more ,the family car is not so cheap.besides,it will take more noise,pollution,traffic accidents.more area is needed to construct roads.

这样可以促进国家经济的发展，提高人们的生活水平，方便又省时。同时还能增加就业机会。但有些人认为不宜大力发展，一方面它会使道路变得拥挤，甚至堵车，而且汽车也不便宜。另一方面它会带来很多噪音，污染，事故也会越来越多。修路的占地也很多。

Everyone is not perfect,but we can try our best to make as perfectas we can.

每一个人都不是完美的，但是我们可以尽力使自己变得完美

Comparison was then made between the new plan, which had EUD constraints to parotids, and the former for each individual patient.

结果 在保证靶区和其他危及器官受照剂量不变情况下，EUD优化能够使腮腺的平均剂量和V30显著降低，经T检验，P值都〈0.05。

You will open your eyes and see yourself for who you are. Especially for everything that made you so different from all the awful normals.

你需要睁开双眼，认清自己是谁，特别要小心的是，使你变得如此不同于他人的某个人。

Especially for everything that made you so different from all the awful normals.

你需要睁开双眼，认清自己是谁，特别要小心的是，使你变得如此不同于他人的某个人。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。