The letter wasn't addressed to me but I opened it out of curiosity.

那封信不是写给我的，然而我却出于好奇把它拆开了。

《牛津词典》

I asked out of curiosity.

我因为好奇问了问。

《牛津词典》

Out of curiosity, I paid a visit to Sainz Breeze as I put my hand into a packet of crickets with their tiny eyes and legs.

出于好奇，我去拜访了塞恩兹·布雷兹，我把手伸进一袋蟋蟀里，它们的眼睛和腿都很小。

youdao

Out of curiosity, I compared the Facebook and Google options when it comes to relationship status.

FORBES: There Is No 'Divorce' In The Google Plus World

Just out of curiosity, I went back and looked over my 2010 calendar.

FORBES: CSR 2010: Don't Let Your Job Search Define You

Out of curiosity, I ran down a few other A.G.s in the NFL without much luck: Andrew Gackhar (LB for the San Diego Chargers), Adam Gettis (G for the Washington Redskins), A.J.

FORBES: Former NFL Star Pleads Guilty In Tax Fraud Case