Any problems concentrating in school lately?
最近上课能集中精神吗？
Even milder cases often experience learning difficulties and have problems concentrating.
即使病情较轻也往往会遇到学习困难并难以集中注意力。
Other symptoms include indigestion, loss of appetite, difficulty concentrating, memory problems, clumsiness, feeling generally unwell, lack of energy, fatigue and irritability.
其他症状包括消化不良、没有胃口、难以集中精神、记忆有问题、笨拙、总体感觉不好、缺乏精力，疲倦和易怒。
What does it feel like to be weary? You have trouble concentrating. The problems of the day are like a claw in your brain. You feel pummeled by life.
劳苦是一种什么感觉呢？你面临一大堆麻烦，日常的问题使你挠头，你觉得被生活击溃了。
In other words, your mind can realize the solutions to various problems when you are not even concentrating on them.
换言之，即使你没有集中注意力思考那些问题，你也可能会想到那些问题的解决方法。
And in soldiers diagnosed with PTSD, some of the changes are long-lasting - in addition to emotional problems and intense flashbacks, sufferers can have difficulty concentrating, and startle easily.
在被确诊患有PTSD的士兵中，这些损伤是持久性的，除了情绪恶化和强烈闪回，他们的注意力下降，并且很容易受到惊吓。
These dissatisfactory phenomena have been embodied in a simple name: city disease, marked by a series of social problems triggered by large population's concentrating in large cities.
这些不尽如人意的表现有一个简单的名字：城市病，指的是人口过于向大城市集中而引发的一系列社会问题。
He has worked on computational biology problems since 1994, concentrating on machine learning applications in understanding multidimensional biological data.
他从1994年开始从事计算生物学的研究，兴趣主要集中在如何将机器学习应用于多维生物学数据的理解。
The present situation of sewage harnessing of Qidashan concentrating plant is analysed, and a comprehensive sewage harnessing scheme is put forward in light of the existing problems.
分析了齐大山选矿厂污水治理现状，针对其存在的问题提出了综合治理方案。
This article, concentrating on the existing problems of the section "Official Documents" of the book "Practical Writing", discusses the reasons for its needed revision.
本文重点就《应用写作》一书中《公文》部分存在的问题论述该书亟待修订的理由。
This article, concentrating on the existing problems of the section "Official Documents" of the book "Practical Writing", discusses the reasons for its needed revision.
本文重点就《应用写作》一书中《公文》部分存在的问题论述该书亟待修订的理由。
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