Smile is a good way to commicate with people that we don't
recognisded.and make you life more beautiful.Smile is a skill that
everyone should learn how to do ,for example ,when you work out a
difficult math issue,your face wear a big smile,when you help an old man
cross the road that ahead of your house ,you smile.when we get
something in trouble ,we also should smile ,smile like a warm water warm
our face to face 's distance ,and make our more friendly
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