Meaning of heli | Babel Free
/[he˧˧ li˧˧]/Định nghĩa
helium
Từ tương đương
English
Helium
Cấp độ CEFR
C2
Mastery
This word is part of the CEFR C2 vocabulary — mastery level.
This word is part of the CEFR C2 vocabulary — mastery level.