Forest decline is still poorly understood but leads to the loss of a high proportion of a tree's needles or leaves.
人们对森林衰退还知之甚少，但森林衰退会导致树叶和针叶大面积脱落。
Smell has been the most poorly understood of our senses, and only recently has neuroscience, led by Yale University's Gordon Shepherd, begun to shed light on its workings.
嗅觉一直是我们的感官中受到了解最少的，直到最近，耶鲁大学的戈登·谢泼德领导的神经科学研究才开始揭示它是如何发挥作用的。
This point is I think still poorly understood.
这正是我觉得大家还没有好好理解的地方。
New diseases are, by definition, poorly understood.
新的疾病，从它的定义就可以看出，我们对它知之甚少。
A new disease is, by definition, poorly understood as it emerges.
通过定义就可看出，当一个新的疾病刚开始出现时，人们对它的认识并不透彻。
Despite being a hot topic for so long, scaling is poorly understood.
尽管是一个热议话题，扩展仍是难以理解。
Rubbish may be universal, but it is little studied and poorly understood.
或许垃圾到处都有，但关于垃圾的研究屈指可数，人们对它的了解也少得可怜。
Apply your best resources to the difficult or poorly understood components.
将最佳资源应用于难于理解或对其理解不透彻的组件。
Despite extensive research, their effects on humans are still poorly understood.
尽管以进行了大量研究，但它们到底对人类有多少影响还仍旧知之甚少。
Last year a new bankruptcy law came into effect, but it is incomplete and poorly understood.
去年一项新的破产法生效，但却不完整而且也难以理解。
Crying linked to emotions—perhaps a uniquely human behavior—is poorly understood by scientists.
哭泣和情感相连——可能是人类独有的行为——很难被科学家理解。
Yet, the values of these resources are poorly understood and their management has been neglected.
然而，人们对这类资源的价值认识不足，忽视了对它们的管理。
The effects of mixtures of trace elements are poorly understood and could cause further health concerns.
至于微量元素混合物产生的影响，人们对此知之甚少，但此类混合物会引发更深远的健康问题。
In many under-resourced countries, the magnitude and scope of the influenza burden are poorly understood.
在许多资源不足的国家，人们对流感负担的严重程度和范围了解不足。
Activists have long raised concerns about the poorly understood links between the environment and health.
人们向来对环境和健康之间关系知之甚少，但是有关积极分子却指出这两者密切相关。
Planets are known to migrate toward or away from their stars over time, but the process is poorly understood.
人们知道行星会随着时间的推移向着或者背离其恒星迁移，但人们对其过程知之甚少。
The injuries are poorly understood, and sometimes produce lasting mental, physical and emotional problems.
这种脑损伤很让人费解，因为它有时会引起精神上、身体上和情感上的一些问题。
The census also supplies detailed data about poorly understood groups of people, such as some ethnic minorities.
人口普查也可为我们提供那些外界知之甚少的群体的详细数据，如一些少数族群。
There is a reason for this: the brain is a complex organ and the causes of its disorders remain poorly understood.
其原因在于：大脑是个复杂的器官，对其功能失调的原因仍然所知甚少。
This has contributed a great deal to the fact that it has been poorly understood, what the importance of language has been.
这个现象让我们明白一件始终不容易让人了解的事实，那就是语言的重要性是什么？
It's a poorly understood phenomenon, but according to the experts who've studied them, these people aren't just messing with us.
这是一个难以理解的现象，研究此现象的专家说，这些人确实没有故意耍我们。
But there is a darker side to adolescence that, until now, was poorly understood: a surge during teenage years in anxiety and fearfulness.
不过，人们现在才发现，青春期还有鲜有人了解的较为阴暗的一面：在青少年阶段，焦虑和恐惧会激增。
New diseases are, by definition, poorly understood when they emerge, and this is most especially true when the causative agent is an influenza virus.
从定义上讲，人们对新出现的疾病了解很少，从病原体是流感这一点上可以看到这一点。
The magnetic activity of stars like sun, which is the root cause of the sunspot cycle, is still poorly understood even after decades of intense study.
磁场的变化是像太阳这样的恒星表面黑子活动周期的根源，尽管经过几十年的认真研究之后，地球人仍然对其知之甚少。
The magnetic activity of stars like sun, which is the root cause of the sunspot cycle, is still poorly understood even after decades of intense study.
磁场的变化是像太阳这样的恒星表面黑子活动周期的根源，尽管经过几十年的认真研究之后，地球人仍然对其知之甚少。
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