He usually works extra on weekends.
他通常在周末加班。
他特别努力。
She often works extra hours. She has devoted most of her time to her work.
她总是加班，把她的大部分时间都奉献给了工作；
"Challenge Cup" National Science and Technology College of extra-curricular academic competition works …
挑衅杯全国大学生课外学术科技作品比赛“的官方英文名是什…
"Challenge Cup" National Science and Technology College of extra-curricular academic competition works …
挑衅杯全国大学生课外学术科技作品比赛“的官方英文名是什…
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