Water , H2O , is the most common substance that its gas ( steam ) , liquid ( water ) , and solid ( ice ) phases are widely known .
(Water , H2O; is; the most common substance that its gas ( steam ) , liquid ( water ) , and solid ( ice ) phases are widely known) (its gas ( steam ) , liquid ( water ) , and solid ( ice ) phases; are known; )
Water , H2O its gas ( steam ) , liquid ( water ) , and solid ( ice ) phases
is are known
the most common substance that its gas ( steam ) , liquid ( water ) , and solid ( ice ) phases are widely known