名词
中文翻译：投机
同义词：
['investment', 'guessing']
例句：
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1.The stock market is full of speculation and risk.
股市充满了投机和风险。
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2. He speculated on the future of the company before it was founded.
他在公司成立之前就对它的未来进行了推测。
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3. The government's speculation about the economy has caused concern among investors.
政府的对经济的推测引起了投资者的担忧。