有困难的

The braid group is infinite non-commutative group, and it has many hard problems that can be utilized to design cryptographic primitives, such as the word problem, conjugacy problem and root problem.

辫群是一种非交换的无限群，该群中有许多困难问题是不可解的，如字问题、共轭问题和根问题等，利用这些困难问题可以去设计一些密码协议。

Another example is the use of basic aluminum chloride, which price is high, especially for reactive dyes Reactive Red Decoloration difficulties, sediment light, loose, high moisture content, detreated narrow coverage, such as the shortcomings of the effect of treatment was less than desirable, on the activity of red, Sulfur Black, etc. Decolorization of dyes, both at home and abroad have been found has been reported, FT The successful development of a just solution to the above-mentioned difficulties, to make up for the other types decolorant shortcomings.

又如使用碱性氯化铝，它价格高，对活性染料特别是活性红脱色困难，沉渣轻，松，含水率高，脱色覆盖面窄等缺点，处理效果不够理想，对活性红，硫化黑等类染料的脱色，国内外还未发现有报导，FT的研制成功正好解决了上述的困难，弥补了其他类型脱色剂的缺点。

"We have in the leadership of President Obama someone who wants us to reach out to the world, to do so without illusions - understanding the difficulties we face will not be wished away, but meeting them forthrightly and smartly, and that we want to seize the opportunities that exist as well," said Secretary of State Hillary Clinton.

她说："我们有奥巴马总统的领导，他要求我们和世界接触，而且不要抱有幻想，要认识到我们面临的困难不会因为我们一厢情愿而不复存在，我们要正视和灵活应对这些困难。而且我们要抓住机会。"

He will have to mange this little restaurant all by himself.

这也就意味着他将来可能要碰到一些困难，不过，他有能力克服这些困难，把餐馆的生意做好。

It was tough, you'd be surprised how difficult it is to relinquish a cell phone.

很困难，你会对放弃手机有多么困难感到惊讶的。

As a result of interest structure gigantic adjust, it is difficult that the life of some townsmans appeared, the townsman life that has few number more produced severe difficulty.

由于利益结构的巨幅调整，有些城市居民的生活出现了困难，更有极少数的城市居民生活发生了严重困难。

The percentage of crying (49.6%) and dysuria (43.4%) were significant in the primary symptom.According to systematic classification,dysuria,oliguresis,deep color of urine,nephelium,urinary crystal and particulate matter (altogether 88.0%) were significant in the urinary systemmatic symptom.The percentage of digestive systemmatic symptom was 33.1%,for example,Bdelygmia,anabole,abdominalgia.

首发症状以哭闹和排尿困难所占比例最高，分别为49.6%、43.4%；按系统分，以排尿困难、少尿、尿色深、浑浊、尿中有结晶和颗粒物等泌尿系统症状为主，占88.0%；恶心、呕吐、腹痛等消化系统的症状占33.1%；发热、烦躁、咳嗽、乏力等一般症状占20.8%。

But you ought to recognize those history is full of 例子s of men and women who achieved outstandingness despite facing difficulties so steep those them easily have to HAs cruITd theirss spirit and left them lying in the dust.

但你必需认识到古代事件上有许多例子讲述在克服重重困难之后才获得胜利的人，那些困难之大足以使她们变得意志消沉，浮于尘世。

It will make you more petrified of the problems and the dangers of failure and you will lose all your courage one day.

这回让你更加惧怕困难和失败，总有一天你会失去所有的勇气，失败和困难不会放弃对你的追逐。

Open and close a long time and a high degree of large gate valves open and close as to be fully on or off, Cast Steel Gate Valve Series damper travel large, open space use to a certain, high dimensions, large space required for installation.

启闭时间长，高度大由于闸阀启闭时须全开或全关，闸板行程大，开启用要一定的空间，外形尺寸高，安装所需空间较大。(3)结构复杂闸阀一般都有两个密封面，给加工、研磨和维修增加一些，困难零件较多，制造与维修较困难，成本比截止阀高。

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。