虽然摇摆舞现在风靡全球，但它最初是在20世纪20年代至30年代间的纽约爵士乐运动中出现的。
Though Swing is now popular worldwide, it first appeared alongside the jazz movements of the 1920s and 1930s in New York City.
20世纪20年代和30年代间由于黄金本位的限制使得国家对预算和贸易赤字都要小心控制。
Keeping within the confines of the gold standard in the 1920s and 1930s required countries to keep close control of budget and trade deficits.
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