短语词组用作动词 (v.)～+副词speculate casually 碰巧地猜测speculate rashly 轻率地推测speculate shrewdly 精明地猜测speculate theoretically 理论地猜测～+介词speculate about 关于…思索speculate as to 为…思索speculate for 〔in〕 投机speculate on 关于…推测短语 返回 speculating