To prove them wrong, Thales bought up all the local olive presses in the winter when they were cheap, and then, using his monopoly power, sold them at very high prices in the summer, when the presses were needed.

为了证错了，泰勒斯冬低价收购了当地所有的橄榄榨油机，然后利用的垄断地位，急需榨油机时以高价出售，从而使自己变得富有。