חַמצָן 用英语:

You can't live without oxygen.

Oxygen is needed for combustion.

Oxygen from the air dissolves in water.

Plants make oxygen.

Trees give off oxygen and absorb carbon dioxide.

Oxygen is taken into our lungs when we breathe.

Body temperature rising, pulse rising ... he's in a state of oxygen deficiency.

Lack of oxygen is fatal to most animals.

Without oxygen, all animals would have disappeared long ago.

Trees produce oxygen, needed by people and animals.

blood takes oxygen from our lungs to other parts of our body, too

When we breathe out, how much of that air is oxygen?

He went to hospital and they gave him pure oxygen.

We need to breathe fresh air to get oxygen to our brains.

Iron and oxygen are elements.