名词
中文翻译：Unknown
同义词：
['investment', 'speculation', 'gamble']
例句：
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1.The stock market is full of speculative activity.
股市充满了投机活动。
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2. He madea fortune by speculating in real estate.
他通过房地产投机赚了一大笔钱。
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3.The company's stock price has beenspeculatively influenced by the news.
该公司的股票价格受到新闻的影响而波动不定。