Even without the problem of regional differences, rocks present a difficulty as unique time markers.
即使没有区域差异的问题，岩石作为独特的时间标记也是一个难题。
If you have difficulty answering a question, leave it and move on to the next one—don't spend time tying yourself in mental knots over each question.
如果你回答一个问题时有困难，那就别管它，继续下一个——不要把时间都花在考虑一个问题上。
We need to stop blaming poverty, parents or the home environment for the difficulty a child has in learning.
我们不应因孩子在学习上有困难而去谴责贫穷、父母和家庭环境。
If you find it hard to stop thinking about the pain or difficulty a challenge may cause you, remember that you don't have to listen to your thoughts.
当你觉得放弃思量一个挑战是否会给你带来痛苦和困难是件不易的事情，记住，你并不需要听取你的想法。
If you experience difficulty with the superglue not creating a bond with dry wood, moisten the surfaces with water.
如果你用强力胶难以粘上干燥的木头，就用水润湿木头表面。
He's a real genius but he has difficulty verbalizing his ideas.
他确实是个天才，可是难以用语言表达他的思想。
A major difficulty is assessing whether this tool-using behaviour is a sign of intelligence.
一个主要的困难是评估这种使用工具的行为是否是智能的标志。
Sometimes it's only when a difficulty is removed that we realise what it was doing for us.
有时候，只有当困难被克服了，我们才会意识到它为我们做了什么。
It goes without saying that we should help a comrade in difficulty.
同志有困难当然要帮助。
A little difficulty like this is nothing to us.
这点困难算不了什么。
Many students have difficulty in delivering a speech in public, but they can overcome it through training.
很多学生觉得当众发表演讲很困难，但通过训练他们可以克服这一问题。
In fact, cost-sharing could be a very practical solution, especially in times of financial difficulty.
事实上，成本分摊可能是一个非常切实可行的解决方案，尤其是在财政困难的时候。
Hugging "is a marker of intimacy and helps generate the feeling that others are there to help in the face of difficulty."
拥抱是“亲密的标志，它帮助自己在面对困难时产生别人会伸出援手的感觉”。
In Type 3 situations, there are few alternatives, but the ability to switch without difficulty creates a threat that companies can use to negotiate concessions from existing suppliers.
在第三种情况下，几乎没有其他选择，但毫无困难地转换的能力造成了一种威胁，企业可以利用这种威胁与现有供应商谈判让步。
The difficulty of a problem was defined in terms of how long it took to complete.
问题的难易度是以解决这个问题所花时间的长短而定的。
He started humming a tune, then interpolated the odd word as though having difficulty remembering.
他开始哼起一个曲调，尽管记得不太清楚，他又插入了几个词。
Nevertheless one is forced to recognize that in times of financial difficulty the university has a duty to decide where money can be saved.
然而，人们不得不承认，在经济困难时期，大学有责任决定在何处省钱。
Attempts to identify New Guinean's hunter-gatherers face the well-known difficulty of defining what constitutes a hunter-gather group.
试图确定新几内亚的狩猎者和采集者面临着一个众所周知的难题：界定什么是狩猎者-采集者群体。
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