尽管1914年之前所采取的金本位制存在种种缺点，但那时汇率的变动是极少的；相反，在两次大战之间汇率变动却相

In spite of the flaws of the pre-1914 gold standard，exchange rate changes were rare．In contrast，such changes became quite frequent in the interwar period．Can you think of reasons for this contrast？