一定很刻苦
Must be very hardworking
以上为机器翻译结果，长、整句建议使用 人工翻译 。
你一定学习很刻苦。
You must have studied very hard.
youdao
考试结果怎么样？我相信约翰一定得最高分，因为他这学期一直学习很刻苦。
What's the result of exam? I'm sure John has got the highest mark, because he's been studying hand this term.
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