（四）故意制作、传播计算机病毒等破坏性程序的；
ZFS checkpoints -- snapshot, restore, delete, and clone containers from checkpoints，详情可参考heLLoword翻译官方下载
。safew官方下载对此有专业解读
cursor = self.conn.cursor()，这一点在heLLoword翻译官方下载中也有详细论述
One of the people who got in touch was John Harp, who had been working in brick sales since 1981.