年幼无知

zhǐ yīn wǒ dàng shí nián yòu wú zhī huàn lái rú jīn de rè lèi mǎn yíng

只因我当时年幼无知，换来如今的热泪满盈。

Before I was young and foolish, and now I'm full of tears.

tā zhè nián jì de hái zi nián yòu wú zhī yì shí bù dào wēi xiǎn

他这年纪的孩子年幼无知，意识不到危险。

A child of his age is too young and inexperienced to recognize danger.