这句after all, if they don't后面省略了一些话,就是after all, if they don't (do their best at school, find some kinds of jobs in the end, and get married in their early twenties. )这里面包含的你说得英文文化背景就是They do their best at school, find some kinds of jobs in the end, and get married in their early twenties. 这些都间接体现了英国人的保守。