形容词
中文翻译：Unknown
同义词：
['speculative', 'speculatively', 'speculatively-investment', 'speculative-investment', 'speculative-investment-risk']
例句：
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1. The stock market is a speculative investment that can be very profitable or very risky.
股市是一种投机投资，可能非常有利可图也可能非常具有风险。
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2. He speculated on the future of technology and made some very good predictions.
他对未来技术进行了投机，并做出了一些非常好的预测。
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3. The company's decision to invest in new technology was speculative and may not have been wise.
公司决定投资新技术的决定是投机性的，可能不是明智的。