adv.非正式地；非公认地

The tax office told the company, unofficially, that it would be prosecuted. 税务局非正式地告诉公司，它可能被起诉。

Unofficially, some athletes received valuable prizes, including large sums of money from their home city-states. 非正式地，有些运动员得到有价值的奖品，包括他们家乡城邦给的大笔奖金。