speculate

/ˈspek.jə.leɪt/

动词

投机，做投机买卖
The company has been speculating in property for years.
这家公司做房地产投机生意已经有好几年了。
猜测；推测，推断
I don't know why she did it - I'm just speculating.
我不知道她为什么那么做——我只是猜测。