<正> Visitor:What does that painting represent(代表)?Artist:That is a horse grazing(吃草)in a pasture(牧场).Visitor:Where is the grass?Artist:The horse has eaten it.Visitor:But where is the horse?Artist:You don’t suppose(假定)she’d be fool enough to stay thereafter she’d eaten all the grass,do you? She weut off to anotherpasture.