Sometimes, by buying something cheap now, you will be costing yourself more in the long run.
有時候你花了很少錢買了便宜貨,但它日后可能要花掉更多的錢。
that the traveller abroad thereby denies himself the opportunity of getting to know the people of the country visited.
說這種封閉的作法使到國外旅游者失去了了解所去國家人民的機會。