n.投机，猜测，推测，推断，投机买卖，炒股

原形：speculation复数：speculations

Mary lost all her money in speculation.
玛丽将所有的钱赔进了投机买卖。
He examined Tom with an air of speculation.
他若有所思地仔细打量着汤姆。
The news of a possible merger caused much speculation among investors.
（有关可能合并的消息在投资者中引发了大量猜测。）
Her sudden resignation sparked widespread speculation about the company's future direction.
（她突然辞职引发了对公司未来方向的广泛猜测。）
Financial analysts engage in speculation when predicting market trends.
（金融分析师在预测市场趋势时会进行推测。）
The discovery of ancient artifacts led to much speculation about the civilization that once inhabited the area.
（古代文物的发现引发了对曾经居住在该地区的文明的诸多推测。）
He based his theory on speculation rather than empirical evidence.
（他的理论基于推测而非实证证据。）
The media's speculation about the celebrity couple's relationship status created a storm online.
（媒体对该名人情侣关系状态的猜测在网上引发了一场风波。）
Speculation about the author's true identity has been rampant since the book's publication.
（自从这本书出版以来，关于作者真实身份的猜测就一直盛行。）
The rise in housing prices has fueled speculation that there may be a bubble in the real estate market.
（房价上涨加剧了人们对于房地产市场可能存在泡沫的猜测。）
Some economists argue that unregulated financial speculation was a major factor in the 2008 economic crisis.
（一些经济学家认为，不受监管的金融投机是2008年经济危机的主要因素之一。）
The scientist's hypothesis was initially met with skepticism and speculation from her peers.
（这位科学家的假设最初遭到了同行们的怀疑和种种猜测。）