The past is a ghost, haunting the present.
兒童教育是人類最重要的一個(gè)問(wèn)題。
"Model checking is a powerful technique for verifying the correctness of finite-state concurrent systems."
敢于冒險(xiǎn)就是暫時(shí)失去立足點(diǎn)。不敢冒險(xiǎn)就是失去自己。