心理学家纷纷猜测在过去的五十多年里，有关忧虑，抑郁症增加的可能原因。

Psychologists have speculated about the possible reasons for this increase in both anxiety and depression over the last fifty years.

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大家已经纷纷猜测首相可能早些在4月或者晚些在6月3日(最晚可能的日期)去农村。

This has sparked speculation that the prime minister might go to the country either earlier, in April, or later, on June 3rd (the last possible date).

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人们纷纷猜测，他会让战争升级还是让战争冷却好开始谈判，但谁也没有真正预计到演讲的内容。

There was speculation about whether he would escalate the war or cool it a little in the hope of starting negotiations, but nobody really saw what was coming.

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