英语
西班牙语
英语
西班牙语
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单语范例（未经PONS编辑处理）
The neighborhoods physical appearance improved noticeably, and many residents felt a new sense of optimism.
en.wikipedia.org Within months, 40 gold mining companies were established, and there was tremendous optimism and financial speculation.
en.wikipedia.org It was a period of optimism and hedonism, and a cultural revolution.
en.wikipedia.org The pigeons group rises from the center, symbolizing joy, optimism and a bright future.
en.wikipedia.org His defensive performance provided even more cause for optimism.
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