Before you brush this argument aside as rubbish, or think of joy as an unaffordable luxury in a nation where there is awful poverty, low academic achievement, and high dropout rates, think again.
在你把这个论点当作垃圾置之不理之前，或者在你认为对于一个极其贫困、学术成就低和高辍学率的国家而言，快乐是一种负担不起的奢侈品之前，再想想吧。
For example, it is clear that low academic achievement by black youngsters poses serious handicaps.
例如，很明显，黑人青少年的低学业成绩构成了严重的障碍。
Women teachers may also unwittingly perpetuate low expectations of boys' academic achievement and encourage girls to work harder by letting them think they are cleverer.
女教师还可能在长时间内无意中对男孩的学业成绩期望值较低，让女孩认为自己更聪明，从而鼓励女孩更用功学习。
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