➡️⇌⬅️

#equilibrium #reversible process #reversible reaction #two states #bidirectional #state change

⚪↔️⚫

#state change #switching #binary #two states #fluctuation #toggle #between

👑⬆️⬇️

#carolinas #north carolina #south carolina #nc #sc #king charles #two states

☀️🌊/⛈️🌊

#stormy sea #two states #ocean symbols 2

😇//😳

#shy reaction #innocent exterior #embarrassed inside #two states