English
ZH
TH
VI
EN
DE
ES
IT
FR
TH-EN
DE-EN
ES-EN
FR-EN
ni tơ
nitrogen
nitrogen
Lesson
Eng
Picture
L098 P4051
nitrogen
Vie
Deu
Northern Pronunciation
Goethebuch
English
Oxford3000 Italian
GLOSSIKA Italian
nitrogen
Oxford3000Ten
nitrogen
GLOSSIKA
ni tơ 
nitrogen