radon
/ˈɹeɪdɒn/
A colorless, odorless gas from the ground.
“Some radon seeped into the basement from the soil.”
My Deck에 추가
inoh
inoh
/ˈɹeɪdɒn/
A colorless, odorless gas from the ground.
“Some radon seeped into the basement from the soil.”
My Deck에 추가