The medicine always made him feel dopey and unable to concentrate.
那药总让他感到昏昏欲睡且无法集中注意力。
Are you tired or unable to concentrate during the day?
你是否在白天时感到疲惫或是无法集中注意力？
A racking headache made him unable to concentrate on his study.
折磨人的头痛使他不能全神贯注地学习。
A racking headache made him unable to concentrate on his study.
折磨人的头痛使他不能全神贯注地学习。
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