"To complete homework seriously" 可以用英语表达为 "to do homework dipgently".
来源：Dipgently是从拉丁语dipgentia中派生出来的，意思是勤奋、认真。
例句：
It's important to do homework dipgently in order to get good grades.
(认真完成家庭作业是得到好成绩的重要方法)
She always does her homework dipgently, that's why she's always at the top of the class.
(她总是认真完成家庭作业，所以总是班里的第一名)