咱们一定要好好学习汉语。
我明天一定要好好学习！
在这里一定要好好学习，争取早日回归社会。
Here we must study hard, strive for an early return to society.
一定要好好学习。
我一定要好好学习，长大让您过上快快乐乐的好日子。
I have to study well and grow up happily let you lead a good life.
哦！原来每个节日都有来历，以后我们一定要好好学习，多了解节日的来历。
Oh! ! After original each festival has a history, we must study hard, get to know the history of the festival.
哦！原来每个节日都有来历，以后我们一定要好好学习，多了解节日的来历。
Oh! ! After original each festival has a history, we must study hard, get to know the history of the festival.
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