For example, they feel sleepy in classes and cannot concentrate attention on their study completely.
比如说，他们在课堂上会感到困，无法完全集中注意力在学习上。
The most difficult one was that they could not concentrate attention and could not remember information.
其中最大的困难就是注意力无法集中和无法记住关键信息。
If you don't concentrate your attention on work, you will achieve nothing.
如果你不把心思放在工作上，你终将一事无成。
I tried to concentrate my attention on my English studies.
我努力把我的注意力集中到我的英语研究上。
I tried to concentrate my attention upon my chemical researches.
我尽力把注意力集中到了化学研究上。
I can't concentrate my attention on it if I don't smoke.
我如果不吸烟，注意力就无法集中。
We must concentrate our attention on efficiency.
我们必须把注意力集中在效率上。
Never concentrate all your attention on one or two problems.
切勿把你的注意力只集中在一两个问题上。
Attention can not concentrate, or sleep of poor quality, or more seriously, loss of self-sufficiency.
注意力不能集中，或睡眠质量差，严重者甚至丧失生活自理能力。
Able to concentrate and give the speaker full attention.
能够集中精力并给予说话者充分的注意。
Your whole attention should be pointed at the object you have chosen to concentrate upon.
您的整个应注意指出，在反对您所选择的集中。
Children's attention is not easy to concentrate.
儿童的注意力很不容易集中。
I have a short attention span. I just can't concentrate.
我是个注意力很不集中的人，无论如何就是无法专注。
They concentrate all their attention on video games, with their hands busy operating.
他们把所有的注意力都集中于游戏，手一直忙于操作游戏指令。
It's not easy for a child to concentrate their attention.
儿童的注意力很不容易集中。
It's not easy for a child to concentrate their attention.
儿童的注意力很不容易集中。
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