際際滷shows by User: aresfeehily / http://www.slideshare.net/images/logo.gif 際際滷shows by User: aresfeehily / 際際滷Share feed for 際際滷shows by User: aresfeehily https://cdn.slidesharecdn.com/profile-photo-aresfeehily-48x48.jpg?cb=1523621318 T担i kh担ng c担 董n v狸 t担i c坦 nhi畛u b畉n b竪. Nh動ng t担i c担 畛c v狸 鱈t ng動畛i hi畛u t担i ! If I feel unhappy, I do mathematics to become happy. If I'm happy, I do mathematics to keep happy !