Dictionary/了然于胸

了然于胸 了然於胸

liǎo rán yú xiōng

ㄌㄧㄠˇ ㄖㄢˊ ㄩˊ ㄒㄩㄥ
Idiom
1(idiom) to be well aware; to understand clearly

Characters

了然于胸