在四川，上星期的今天发生了地震。
昨天晚饭你吃的是什么？今天的早饭呢？上星期五的午餐又是什么？
What did you have for dinner last night? How about breakfast this morning? Lunch last Friday?
要是今天的演出很棒，我就可以说：They are boss ！但是上星期的表演不怎么样，那就是：Theyweren ' tso boss。
LL: If you don't think something is that great, you can say something is not so boss.
三名上星期参加中国第三次载人太空任务和第一次太空行走任务的中国宇航员今天在北京的凯旋庆祝会上受到了热烈欢迎。
The three Chinese astronauts who participated in China's third space mission and first spacewalk last week were greeted with a warm homecoming celebration today in Beijing.
利用回闪查询，用户可以查看数据库今天早晨，昨天甚至上星期的状态。
Using Flashback query, you can query the database as it existed this morning, yesterday, or last week.
利用回闪查询，用户可以查看数据库今天早晨，昨天甚至上星期的状态。
Using Flashback query, you can query the database as it existed this morning, yesterday, or last week.
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