难

It's hard to alter a single factor without altering others.

我们很难在不改变其他因素的情况下改变其中的某个因素。

Although its mode of operation is very simple, the player needs to use only left / diamonds of shift of right Xiang Jian, alternate key undertakes gyral but begin, but the whirl of diamonds is controlled extremely hard however, can 360 degrees of random rotate.

尽管其操作方式极为简单，玩家只需用左/右方向键移动方块，交叉键进行旋转便可上手，但是方块的旋转却极难控制，可以360度任意旋转。

The numerical ex-periment has shown that the number of iterations depends significantly on the positiveparameterα,β. But, in general, it is di?cult to choose a proper parameterα,β. Thuswe propose new self-adaptive alternating direction method which adjusts the scale pa-rameter automatically per iteration based on the message of the iterates. We have provedthe convergence of the method under mild assumptions.Finally, we present some numerical results.

对于我们提出的新交替方向法，数值实验表明，迭代的步数与时间与所取的参数α，β有关，然而我们很难去选择一个合适的参数α，β，因此我们提出新自适应交替方向法，对其中的参数α，β进行自适应调整，这种自适应算法根据每步迭代信息自动地调整参数α，β，并证明了算法的收敛性。

An alternative hypothesis is that complex morphology improves economy and clarity of expression, something that is desirable so long as it is not too difficult to learn.

另一种则是，复杂的语言形态改善经济，以及使表达更为清晰。或者说这些是必须的，只要它们不会把语言变得那么难学。

It is difficult to breathe at these altitude.

在这些高的地方很难呼吸。

This is seen in the most advanced stages of Alzheimer's disease, the researchers stated.

比如，我们自己的名字存在于数不清的神经回路中，很难遗忘。

It is not that China's top rulers are ambivalent about coal mining deaths.

这并不是说中国的高层统治者对矿难死亡存有矛盾心理。

The elephant population has stabilized at more than 200, officials say, though the animals amble through a remote territory that straddles the border with Laos, making it difficult to count them.

官方说大象的数目已经稳定在200头以上，虽然这些动物生活在遥远的中挝边界上，很难去统计。

It is quite difficult to effectively treat amblyopia at this point.

到了这一步，就很难有效地治疗弱视了。

They have received extensive attentions of the researchers both home and abroad because of their high degradation efficiency, instrumental simplicity, and amenability to the environment.

因其处理效率高、操作简便、与环境兼容等优点引起了研究者的广泛关注。它能在常温常压下，通过放电反应直接或间接产生羟基自由基，紫外线和高能冲击波，从而有效降解难生化降解的污染物。

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。