speculate
v
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.
I suggest that we ask users of this machine what they think about it. We can photograph them using it too. Then we can put their comments at the top of the advertisement in big print. We can bring in some humour too. People enjoy reading humorous ads.