letter was a carrier which was used to communicate in the ancient.
However,the mobile phone has been the medi-resonance between people`s communication in nowadays world.therefore,I hold the opinion that the product has the selling point whose appearance is designed by mix the two things` thought selects if it is turned into material object letter was a carrier which was used to communicate in the ancient.
However,the mobile phone has been the medi-resonance between people`s communication in nowadays world.therefore,I hold the opinion that the product has the selling point whose appearance is designed by mix the two things` thought selects if it is turned into material object