The things which have the greatest value in use have frequently little or no value in exchange; and, on the contrary, those which have the greatest value in exchange have frequently little or no value in use.

。 具有最大使用价值的东西通常交换价值很小或没有交换价值； 相反，那些具有最大交换价值的东西往往很少或没有使用价值。