懵懂

dàng shí hěn měng dǒng

当时很懵懂

be muddled at that moment

shí fēn měng dǒng wú zhī

十分懵懂无知

ignorant and dull very much

tā cōng ming yī shì měng dǒng yī shí

他聪明一世，懵懂一时。

He is smart as a rule, but this time is a fool.

ràng wǒ měng dǒng de xīn huò rán kāi lǎng

让我懵懂的心豁然开朗。

Let my ignorant heart suddenly see the light.