My attention span is short when I am tired.
我累的時候，注意力持續時間很短。
Many kids have short attention spans in class.
很多小孩在課堂上注意力持續時間很短。
She has an attention span of about ten minutes.
她的注意力大約能持續十分鐘。
I try to improve my attention span by taking breaks.
我試著透過休息來提升注意力持續時間。