我很后悔我浪费了很多时间我应该学习
正是您的帮助，我才得以完成学习
I regretted very much that I watsted so much time that I should study.
It's just with your help that I could finish studying.
I am very regret for wasting so much time, which shall be used in study.
it's your help that helps me finish my study.
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