过去是一个幽灵，萦绕在现在。
The past is a ghost, haunting the present.
最优秀的血统往往会脱颖而出。
Tyranny, like hell, is not easily conquered; yet we have this consolation with us, that the harder the conflict, the more glorious the triumph.
The ability to edit genes is a profound responsibility—one we must approach with humility.