目睹当今小学生书包的大小与重量，很多成年人都觉得自己的童年比他们现在的童年要快乐。
Just from the weight and size of school bags, many people believe they were happier as a child than the children are today.
小学生书包平均重4.2公斤，超过标准达百分之53.4 .书包标准重量等同学童重量的百分之十。
On average, a primary school pupil's school bag weighs 4.2 kg, 53.8 per cent heavier than the recommended weight - which is 10 per cent of a pupil's weight.
小学生把书包扔向空中。
沉重的书包压得那小学生歪向一边。
沉重的书包压得那小学生歪向一边。
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