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This is also very useful, albeit more difficult to set up.

虽然它们都比较难设置，但绝对是非常有用的。

All these activities can increase alertness and make it difficult to fall asleep.

所有这些活动会提高你的灵敏度，让睡觉变得很困难。

Although Alexander Fleming DISCOVERED that the mold Penicillium notatum has antibacterial properties, he was not a chemist and growing and culturing the mold was difficult for him.

尽管弗莱明发现了霉菌盘尼西林可以抗菌，但是他并不是一位化学家而且培育霉菌对他来说也是一件难事。

However, compatriots Alexandre Pato and Diego have offered their support to him at this difficult moment.

然而他的同胞帕托和迭戈在他现在的困难期给予了他很大的支持。

It is very difficult to find natural alexandrite gemstones.

这是很难找到的天然宝石宝石。

Comparing to the algebraic polynomial,the trigonometric polynomial interpolation studying is more difficult ,and the methods are more different.

与代数多项式相比，三角多项式插值的研究要困难一些，研究方法也有众多不同。

Since the visualization of implicit algebraic surface is still a difficult problem, it is doubtlessly meaningful to construct some convenient and effective parameterization method for some kind of concrete implicit surfaces.

由于隐式代数曲面的显示问题始终是困扰人们的一个关键性难题，从而针对具体形式的代数曲面，能给出方便有效的参数化方法无疑是有意义的。

Of a website grow the law that has it, from gather enough much person is angry, the process that arrives to turn discharge into cash reserve in a bank often very anguish and difficult get close to, need a good deal of and a good deal of financing even, in Internet winter blast blast when algidity raids a person, zhang Xi chose to set out however.

一个网站的成长有它的规律，从聚集足够多的人气，到将流量变成现金的过程往往十分痛苦和难捱，甚至需要大笔大笔地融资，在互联网冬天阵阵寒气袭人的时候，张曦却选择了出发。

It is a difficult task to parallelize the existing sequential algor ithm.

对已有的串行算法进行并行化，是一项很困难的工作。

It is difficult to proide a scientifically alid definition of "added alue."

很难为"附加值"做出一个科学有效的定义。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。