- 1.
推测；猜测；思考；思索 -
• I can't speculate on the reason why he made such a decision. 我猜不透他做出这个决定的原因。 -
• Human beings have been speculating about the future. 人类一直在遐想未来。 - 2.
做投机买卖 -
• The businessman was speculating in land. 那个商人在做地产投机买卖。 -
• He had been speculating on the stock market for years. 他从事过很多年的股票投资。