educational duty ; educational tariff
做家庭作业不仅可以帮助孩子掌握他们所学的知识，而且能培养的能力独自完成这项工作的规划，时间和做这些关税。
Doing homework not only can help children master the knowledge they have learned, but also can train their abilities of finishing the work alone, planning the time and doing the duties.
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