查询词典 difficult problem

In the research of the valency of modern Chinese verbs, the two-valence transitive verbs are difficult. That's because the quality of this kind of verbs is huge, and various in style. It's difficult to summarize the overall characteristic.

在现代汉语的配价研究中，二价动词的研究是一个难点，主要是因为二价动词数量庞大，种类繁多，因此不容易总结出总体特点。

Vietcong guerrillas were often difficult to distinguish from civilians and moved effectively in the difficult terrain.

越共游击队经常很难与平民区分开来，并且在复杂的地形中行动迅捷。

Shanghai Institute of Mechanical ＆ Electrical Engineering,Shanghai 200040,ChinaAbstract: With the development of pulse arc welding,especially to foretime some material with high heat tenderness difficult to weldthe situation difficult to weld(such as full position welding,narrow gap welding,and the pipe,thin workpiece need singlefaced welding to make doublefaced moulding).

脉冲弧焊工艺的发展，特别是对一些难焊的、热敏感性高的材料和难于施焊的场合(如全位置焊、窄间隙焊以及要求单面焊双面成形的管件、薄件)，脉冲焊均显出独特的优越性。

"The diagnosis of pneumonia in children with wheezing can be difficult, because the clinical history and auscultatory findings may be difficult to distinguish from those for children without pneumonia," write Bonnie Mathews, MD, from Children's Hospital Boston and Harvard Medical School in Boston, Massachusetts, and colleagues.

July 10， 2009 —根据一项发表於7月号小儿医学期刊的前瞻性世代研究结果，有哮喘症状但没有发烧的儿童，放射线检查证实肺炎的病例并不常见，因此，并不鼓励常规性地建议进行放射线检查。

Ladies and gentlemen,today i want to talk about the differences between english and chinese.english is very different form chinese.the sounds are different .the grammar is different.and the writing is totally diffenent.it is very difficult to speak english well.if you want to speak english well.you must forget about the differences.just practise corract sentences until you are used to them .the more sentences you can blout out.the better you can express yourself.if you believe in yourself and practise crazily every day .you'll make it .you'll conquer english .chinese is the most difficult language in the world .if you can speak chinese,you can speak english.

女士们，先生们。今天我要谈谈英语和汉语之间的区别。英语是非常不同于汉语的。例如发音不同，语法不同，还有就是书写完全不同。想说好英语是件非常困难的事情。如果你想说一口漂亮的英语，你就必须忘记那些不同之处。尽量多操练正确的句子直到你熟悉他们。你能脱口而出越多的句子，你就越能如意的表达自己。如果你相信自己并且每天都疯狂的练习，那么你就会成功。你就会攻克英语。汉语是当今世界最难的语言，如果你可以说汉语，那么你就可以说英语。

Browner with wear. Where size is difficult to assess may be difficult

然而体型大小不是一个用来分辨这四种黑色海燕的好方法。

Its the most difficult to be a doctor in japan in 'li ke'.also,its the most difficult to pass law exam in'wen ke'.but i must study hard,and i know you want to be a doctor too.so please fight together.when we grow up,we can chane ideas.

在日本，理科最难考的是医生，文科最难考得是法律。我一定要努力学习，我知道你也想当医生，那让我们一起奋斗，当我们长大后，就可以互通有无了。

The original desulfurizing process used hydramine solvent to deprivate most H2S, then carried out alkali wash and water wash. But organosulfur removal was so difficult that individual qulity data of liquid gas were instability and below grade, such as copper sheet corrosion. Furthermore, treatment of alkali residue was very difficult.

装置原采用醇胺溶剂脱除大部分H2S后再采用碱洗、水洗工艺，有机硫难脱除，液化气个别质量指标如铜片腐蚀不稳定，经常不合格；同时碱渣的处理也较困难。

But the bitter " of " difficult character of the man is not an isolated symptom absolutely, actually, the around of the bitter " in difficult character of occurrence male ", tired of the lumbar genu aching and limp that brings about by kidney empty, mind exhausted body, dazed tinnitus, bosom is fuggy short, insomnia make water of forgetful, frequent micturition tine of drop of drop of urgent, make water, deal with an offender shakes, limb cold Wei is cold wait for all sorts of symptoms to be able to appear in succession, must solve these anguish at the same time.

但男人的%26ldquo；难言之苦%26rdquo；绝不是一个孤立的症状，实际上，在出现男性%26ldquo；难言之苦%26rdquo；的前后，由肾虚而导致的腰膝酸软、神疲体倦、头昏耳鸣、胸闷气短、失眠健忘、尿频尿急、尿滴沥、发落齿摇、肢寒畏冷等各种症状便会相继出现%26mdash；%26mdash；%26mdash；解决男性的%26ldquo；难言之苦%26rdquo；，必须同时解决这些痛苦。

The results show that jamesonite and pyrrhotite have good floatability in the pH range of 2-10 and marmatite has good floatability in the acid and it is difficult to separate these minerals. In the pH range of 6-8, the separation of jamesonite and pyrrhotite, marmatite is possible when using mercaptoacetic acid and mercaptoethanol as depressants. In case of the presence of Cu2+ ion, however, it is difficult to separate the three minerals. Infrared spectrum demonstrates that there are a number of function groups such as —SH,—COOH,—OH in the molecular structure of depressant.

结果表明：用丁黄药作捕收剂，脆硫锑铅矿和磁黄铁矿在pH 2~10范围内都有良好的可浮性，铁闪锌矿在酸性条件下可浮性好，三者分离困难；在pH 6~8之间，采用巯基乙酸和巯基乙醇作抑制剂，脆硫锑铅矿与磁黄铁矿和铁闪锌矿的分离是可能的；但铜离子存在时， 3种矿物之间的选择性分离是难以实现的。

Many will continue to choose to live in duality and in conflict.

许多人将继续选择活在二元对立性和冲突中。

I find that students of the University of Physical Education all wear sportswear at first sight.

我发现：体育大学的学生乍一看，都是穿运动衣，大家都一样