那些在最初在集中注意方面没有问题的人们可能在服用注意力增强药物后表现得更糟糕。
People who don't have trouble paying attention in the first place can actually perform worse when they take attention-enhancing drugs.
几天以后，我意识到了增强的精力，集中的注意力，以及更高的自尊心。
After a few days I noticed increased energy, increased attention, and higher self-esteem.
这项眼操通常会增强你集中注意力的能力和眼肌肌力.
This exercise will strengthen your focussing skills and your eye muscles in general.
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