极难

• " just as the threat of climate change has begun to be taken seriously when it may be almost too late , the threat of an obesity - related health disaster around the world needs urgent action because , like climate change , its effects are exceptionally difficult to reverse , " he said
  “就像气候变化问题现在开始得到重视，但为时已晚；所以世界各地由肥胖引起的健康威胁急需解决，因为肥胖与气候变化一样，产生的后果极难挽回。 ”
• “ it makes no sense to tell well - trained , highly skilled individuals , many of whom are educated at our top colleges and universities , that the united states does not welcome or value them , ” mr gates said . “ america will find it infinitely more difficult to maintain its technological leadership if it shuts out the very people who are most able to help us compete
  “这等于告诉训练有素、高度熟练的工人，美国不欢迎或者不重视他们，这毫无道理，何况他们中许多人还在我们的顶尖学院和大学中受教育， ”盖茨表示， “如果美国将恰好最能帮助我们进行竞争的人关在门外，那么它将发现极难维持自己在科技方面的领导地位。 ”
• Of course , functions that are almost one - way are pretty useful , as all public key functions are , at their essence , one - way functions with " trap doors . " functions that are good candidates for public key cryptography are those that are easy to compute in one direction , but very difficult to compute in the other direction unless you know some secret
  当然，几乎是单向的函数是非常有用的，因为从本质上讲，所有的公钥函数都是带“天窗”的单向函数。公钥密码学的良好候选函数，是那些在一个方向上容易计算，而在另一个方向上除非您知道某些秘密否则极难计算的函数。
• In fact , stuff quality of space grid structures member , manufacturing accuracy and construction management are major factor that influence development with high quality and high - level of space grid structures , space grid structures commonly with large span , and more is public buildings , important buildings , mass man under it , dearness equipments on it , erecting at high level , hardest strengthen when happen problems
  事实上，当前网格结构构件的材料质量，加工精度以及施工管理是影响网格结构高质量高水平发展的主要因素。网格结构一般跨度较大，而且多为公共建筑，重要建筑，下面人员众多，设备贵重，网架建在高空，出了问题极难加固。
• It is a dozen metals in one ; now almost diamond - hard - - and again almost as soft as copper ; here brittle as glass ? there malleable1o as silver ; now welding quite readily - - again , very difficult to weld ; melting rather easily - - at other times difficult to diffuse ; usually very magnetic - - and : again almost non - magnetic ; an excellent conductor of heat and electricity - - and at times stubbornly resistant to both
  铁将十多种金属特性合而为一：时而几乎坚硬如金刚石，时而又柔软如铜；此处易碎如玻璃，彼处又可展延如银；时而很容易焊接，时而又很难焊合；有时相当易熔，有时又极难扩散；通常情况下富有磁性，但有时又几乎磁性全无；本是热和电的优良导体，但有时却顽强地抗拒二者。
• This is not because such an interpretation necessarily stiffens into a thesis （ although rigidity in any interpretation of this or of any novel is always a danger ） ， but because wuthering heights has recalcitrant elements of undeniable power that ， ultimately ， resist inclusion in an all - encompassing interpretation
  这倒不是因为这样的一种解释必定会僵化成为一个命题（尽管对这部或任何一部小说的解释中，僵化死板总是一种危险） ，而是因为《呼啸山庄》拥有一些极难驾御的因素，以其无可辩驳的力度，最终拒绝被囿于一个囊括无遗的解释中。
• Among them , the equipment of in situ composition process required simply , and can basically overcame a series of question meted by the other technique , such as the poor wettability between the reinforced particle and metal matrix , reinforced particles are n ' t distributed homogeneously , especially , the minute reinforced particles ( such as sub - mic ron graded and nanometer graded ) are difficultly compounded , and so on . as one new technique , it is attached important to many researchers , and is researched broadly
  其中原位复合工艺设备简单，基本上能克服其它工艺中通常出现的一系列问题，如基体与增强体浸润不良，增强体分布不均匀，特别是微小的(亚微米和纳米级)增强体极难进行复合等，作为一种具有突破性的新工艺方法而受到普遍的重视，并广泛开展了研究工作。