He deduced this from his observations.他从观察中推断出了这一点。

She hoped he hadn't deduced the reason for her visit.她希望他没有推断出她这次造访的原因。

The date can be deduced from references to historical events.日期是可以从提及历史事件之处推断出来的。

Alison had deduced that I wrote the letter.艾莉森已经推断出这封信是我写的。