查询数据库每一秒左右，也不错，但你必须要有那么一点聪明。

Querying the DB every second or so is also fine, but you have to be just a wee bit clever.

youdao

查询数据库每一秒左右，也不错，但你必须要有那么一点聪明。

Querying the DB every second or so is also fine, but you have to be just a wee bit clever.

youdao