not set in stone=be able to be changed不是一成不变的
These issues should be discussed-nothingis set in stone.这些问题是可以讨论的一 没有什么是一成不变的
an age-old problem= a very old problem存在多年的问题
New strategies(策略)are needed to combat(解决) the age-old
problem of discrimination(歧视)atwork对于存在多年的工作上的歧视问题，确实需要新的策略来予以解决。
an enduring problem=a lasting problem持续存在的问题
Even though many countries have agreed to join hands to solve environmental problems,the lack of coordination(协调)of policies and programmes remains an enduring problem.尽管许多国家同意联合起来解决环境问题但合作中出现的缺乏协调和缺乏统一规范现象还有待解决。
pose a problem for sb. =present a problem for sb. 对......来说是一个有待解决的问题
The fact that the costs were so high must have posed a problem for the company. 事实上如此大的花费对于公司来说是个有待解决的问题。
pose a threat to sth. =may cause sth. unpleasant or violent to happen对某事物构成威胁
The continuous use of chemicals for the control of pests, which poses a threat to agricultural crops and human health, is proving to be counterproductive.为控制害虫持续使用化学药品从而对农作物和人类健康构成威胁的做法正在被证明适得其反。
be counterproductive=getting the opposite result to the one that someone wants适得其反的，距离预期目标越来越远的
The continuous use of chemicals for the control of pests is proving to be counterproductive.为了控制害虫而持续使用化学药品正在被证明适得其反。
cause as many problems as sth. solves= bring mixed results(某种发展)所带来的问题和它解决的问题一样多
This solution may cause as many problems as it solves这个解决方案所带来的新问题和它解决的问题一样多。
facilitate the development of sth. =promote the development of sth. 促进某事物的发展
This company facilitated the development of cloud computing with
some of its large-scale research projects.通过一批大规模的研究项目，这个公司促进了云计算技术的发展。
inhibit the development of sth. /arrest the development of
sth. =prevent sth. from developing阻碍某事物的发展(请注意后面一个句型中的arrest不是逮捕的意思，在英式书面写作中它常作“抑制某事物的发展”解释)
Failure to establish an efficient transport network inhibited/arrested the development of international trade. 建立有效运输网络的失败严重阻碍了国际贸易的发展。
accompany sth. =to exist at the same time as sth.伴随着某事物
Changing seasons accompany our planet's revolution around the sun.
季节的变换伴随着地球绕太阳的旋转。
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