n.推测；投机；沉思
They have much speculation over the cause of the air crash. 他们对飞机坠毁原因有多方推测。
Speculation has reached such a pitch that a decision will have to be made immediately. 这种胡乱猜测甚嚣尘上，已经到了必须立即解决的程度了。
He makes some unprofitable speculations. 他在做些无利可图的投机生意。
The Big Bang is a kind of speculation or guess rather than a proven fact. 大爆炸只是一种思索和推测并不是已证明的事实。
反投机的
