题目内容

The fixed exchange rate system established at Bretton Woods failed due to speculative pressures on the U.S. dollar.

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加氢裂化催化剂由和两部分组成，其分别具有活性和活性。

现代插花素材丰富、技巧多样化，表现形式抽象、灵活、自由。

To minimize the risk of an unanticipated change in exchange rates, a company can protect itself by entering into a forward exchange contract.

保证催化剂在两器间以及再生器有良好的是催化裂化装置的技术关键。