This means that when I play outside, I have to wear a 're-breather' that recirculates the air I breathe in order to purify it and make the most of what oxygen is in it.
(This; means; that when I play outside, I have to wear a 're-breather) (the air; breathe; I) (I; play; L:outside) (I; to wear; a 're-breather' that recirculates the air) (a 're-breather; recirculates; the air I breathe in order)
This the air I I a 're-breather
means breathe play to wear recirculates
that when I play outside, I have to wear a 're-breather
I
L:outside
a 're-breather' that recirculates the air
the air I breathe in order