I seem to have mislaid my keys.

我好像不知道把钥匙放在哪儿了。

《牛津词典》

I appear to have mislaid my sweater.

我好像忘了把毛衣放哪儿了。

《柯林斯英汉双解大词典》

I mislaid my English textbook.

我不知把英语课本丢在哪儿了。

《新英汉大辞典》

One theory is that, in the chaos of the forest fire and its aftermath, the drives have simply been mislaid.

BBC: CIA chief takes nuclear secrets role

As for dates, I'd mislaid an entire century, the one separating Columbus's sail in 1492 from Jamestown's founding in 16-0-something.

NPR: Unearthing History in 'A Voyage Long and Strange'

It said it was "deeply concerned" the records had been mislaid and was carrying out an "urgent investigation" into the matter.

BBC: Reassurance plea after patients' records found on road