难通过的

Invariant manifolds are important for the study of dynamic systems. Since they are hard to he computed h analytical expression, the numerical method for approximating invariant manifold is an important mean.

不变流形在动力学研究的许多方面都有重要意义，由于不变流形很难通过解析表达式求解，对其做近似计算就成为重要的手段。

For instance, steel is stronger than iron, its primary component.

这是一种非常灵活和常用的制造大量超耐热合金纳米粒子成分的方法，纳米粒子很难通过其它方法制造。

Even most difficult materials are reliably fed by the top puller feed.

即使难缝的面料，通过上拖轮送布也能实现可靠的输送。

Some babies may have a hard time with the emergence of each tooth, whereas others sail through the experience.

有些婴儿可能很难与时间的出现，每个牙齿，而另一些航行通过的经验。

The thing that a lot of very impracticable looking, very scabrous problem, through start and organizing worker masses, can do, can solve.

许多看来很难办的事情，很难解决的问题，通过发动和组织职工群众，就能够办到，就能解决。

Moreover, it has been proved that weighted sampling can be achieved by multiplying both the spectrum and concentration value of a sample by the same non-negative constant, which has made the computation of sample-weighted models much easier.

为解决以上问题，同时考虑到样品的代表性很难通过考察单个样品进行估计，我们把全局优化样品加权的思想和偏最小二乘相结合，提出了最优化样品加权偏最小二乘这一新算法。

If it is sandier, it will be harder for the bottoms of the roots to get as much water, as it will not soak through, but will stay on the surface of the soil.

如果是桑迪耶，这将是更难底部的根源，以获得多水，因为它会不会浸泡通过，但将留在表面的土壤。

But antitrust expert thinks, such collaboration is examined very hard through superintending a branch, because Yahoo and cereal song are in,network search and advertisement held too much market share.

但反垄断专家认为，这样的合作很难通过监管部门审查，因为雅虎和谷歌在网络搜索和广告占据了太多的市场份额。

Possibility to connect the machine with optional tools for cleaning hard-to-reach corners.

可以通过连接可选用的工具来清洁很难触及的地方。

In the early Universe, the primordial gas cannot efficiently cool radiatively because atoms have excitation energies that are too high, and molecules, which have accessible rotational energies, are very rare.

在宇宙早期，原初气体很难通过辐射有效冷却，因为原子的激发能太高，而有转动能级的分子又太稀少了。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。