1.
oxygen
A chemical element essential for breathing and combustion.
酸素不足
Oxygen deficiency.
酸素ボンベ
Oxygen tank.
Related Words
Related:
水素 (hydrogen)
Related:
窒素 (nitrogen)
Related:
炭素 (carbon)
Related:
二酸化炭素 (carbon dioxide)
Compare:
一酸化炭素 (carbon monoxide)