“Photography is the simultaneous recognition, in a fraction of a second, of the significance of an event as well as of a precise organisation of forms which give that event its proper expression.” -- Henri Cartier-Bresson
攝影的學問學極都學唔晒，只有懷著開放的心去求證，才能獲得正確的知識；有人認為snapshot不能講究構圖，看看大師怎說吧。
proper fraction 在 Proof that all proper fractions can be decomposed into a sum ... 的推薦與評價
Hence, by induction, prove that every proper fraction p/q, where p < q, can be written as a finite sum of distinct reciprocals pq=1n1+…+1nk. ... <看更多>