动词过去式:speculated 过去分词:speculated 现在分词:speculating 第三人称单数:speculates
spec,spect＝to see,to look（看见）
1 [I, Ipr, Tf] ~ (about/on/upon sth) form opinions without having definite or complete knowledge or evidence; guess 思考; 思索; 推断; 推测
*speculate about/upon the future 对未来的推想
* I wouldn't like to speculate on the reasons for her resignation. 我不愿意猜测她辞职的原因.
* I can only speculate that he left willingly. 我看他一定是自愿走的.
2 [I, Ipr] ~ (in sth) buy and sell goods or stocks and shares in the hope of making a profit through changes in their value, but with the risk of losing money 投机; 做投机买卖
*speculate in oil shares 做石油股票的投机买卖
* speculating on the stock market 进行证券投机.
1500-1600; Language: Latin;Origin:
, past participle of speculari 'to watch (secretly)'
, from specere 'to look (at)'
] [I and T]
to guess about the possible causes or effects of something, without knowing all the facts or details She refused to speculate.speculate on/about (why/what etc) Jones refused to speculate about what might happen.speculate that Some analysts speculated that jobs will be lost. [I]
to buy goods, property, shares
in a company etc, hoping that you will make a large profit when you sell themspeculate in/on He speculated in stocks.
1. Some scientists speculate the reduction in mental function often attributed to getting old may really be a penalty of neglecting to stay physically active, in addition to related factors such as medicines and poor diet. 一些科学家推测，除了药物作用和饮食不当等相关因素外，常常归咎于衰老的大脑功能下降实际可能是对不注意保持体育运动的一种惩罚。
2. I can only speculate that he left willingly. 我看他一定是自愿走的.