S1:You shouldn't eat so quickly!S2:I'm starving. And the food is so good that I can't help it.S1:Chewing your food well keeps you in good health.S2:I see.S1:Don't you like vegetables?S2:Yes,I do.Vegetables are tasteless.The meat and fish is my favourite.S1:It's easier for us to serve meat and fish on board. It is harder to preserve vegetables. And it's wasteful to have all these leftover vegetables.S2:I heard that meat is more mutritious and that eating meat gives you more energy than eating vegetables.S1:But to eat a good balanced meal is the most important thing.S2:I see.Q4:What is most important for eating?