speculation

名词 speculation:

1. a message expressing an opinion based on incomplete evidence
   同义词：guess, conjecture, supposition, surmise, surmisal, hypothesis
2. a hypothesis that has been formed by speculating or conjecturing (usually with little hard evidence)
   同义词：conjecture
3. an investment that is very risky but could yield great profits
   同义词：venture
4. continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature
   同义词：meditation

1. 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。
2. She lose all her money in stock exchange speculation.
   她将所有的钱赔进了股票投机生意。
3. 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。
4. My speculations proved totally wrong.
   我猜想的全错了。
5. He makes some unprofitable speculations.
   他在做些无利可图的投机生意。