那个童年的小巷，时间越久越像一个仿佛并不存在的乌托邦。如视频里所说：“你醒啦，你做了一场很长的梦。”
Not Equal: Every domino half in this space must have a completely different number of pips.
，这一点在WPS官方版本下载中也有详细论述
PRIMARY KEY (repo_id, oid)
drop-newest: Discards incoming data when full. Useful when you want to process what you have without being overwhelmed.