The only way to learn mathematics is to do mathematics.
"The act of writing is an act of courage, a defiance against the ephemeral nature of life."
君子不救人，不是沒(méi)有能力，而是不愿意去做。
一個(gè)組織的創(chuàng)新質(zhì)量決定了其增長(zhǎng)的質(zhì)量。