生成完成后，我们就可以直接使用这些实体类进行数据序列化和反序列化操作：
Are you fed up with manual vacuuming and mopping? Well, it sounds like it's time to invest in a robot vacuum. And as of March 2, you can find a great deal on a great model at Amazon. Right now, the EcoVacs Deebot X11 robot vacuum has a hefty discount, down from $1,499.99 to $998.99. That's a saving of $501.
。新收录的资料对此有专业解读
其实消费者的核心诉求只有两条：一是好吃便宜（“好吃”虽无统一标准，但消费者有自己的判断）；二是产品选择多、性价比高、自传播能力强。那些个性鲜明的品牌，之所以能快速崛起，正是因为满足了这些需求。
The United States women’s hockey team has a date with Flavor Flav in Las Vegas in July to celebrate winning the gold medal at the Milan Cortina Olympics.
，更多细节参见新收录的资料
(a “cron job” in UNIX world)
(random() * 5000 + 5)::numeric(10,2),。业内人士推荐新收录的资料作为进阶阅读