名词
中文翻译：Unknown
同义词：
['investment', 'speculation', 'guess', 'guesswork']
例句：
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1. The stock market is full ofspeculation and risk.
股市充满了投机和风险。
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2. Hespeculated on the future of the company's success.
他对公司的未来成功进行了投机。
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3.The government has been accused of engaging inspeculation in the foreign exchange market.
政府被指控在外汇市场上进行投机。