It would be naive to expect the supplier to lower prices without a longer contract.

期待供應商在沒有更長期合約的情況下降價，未免太天真了。

The new intern was a bit naive about how office politics affect promotions.

那位新實習生對辦公室政治如何影響升遷有點天真。

Some travelers are naive enough to leave their passports unattended in hotel lobbies.

有些旅客天真到把護照隨意留在飯店大廳無人看管。