拼命工作, 工作卖力;
I studied art and worked hard at it.
我学的是艺术,也很努力.
Whatever you do, work hard at it and don't try to dodge the column.
无论做什么事, 都要努力去做,别偷懒.
You must have worked very hard at it.
你一定花了很大劲.
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