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重點講解：
1.center around 以...為中心
The structure of international trade comes to center around information products and intangible goods.
國際貿易格局正向著以信息產品及服務為中心的貿易格局轉變。
2.win back 贏回
It is very common for gamblers to feel they should keep gambling until they win back their losses.
賭徒很多時候認為他們應該繼續賭博，直至贏回他們輸掉的錢。
