Certified invoice

certified [['sə:tifaid]]

a. 证明合格的\\n[化] 检定的; 证明的; 书面证明的

invoice ['ɪnvɔɪs]

n. 发票;发货单; v. 开发票;记清单;

in(on)+vo(way)+ice(名词后缀)→发票

Probably a lot of advertising and bills.

大概是一大堆广告和帐单。

I know the boy whose father is a guide.

我知道那个男孩的父亲是导游。

I think it is important to understand the relations between parents and their children. They spend time, energy and money in bringing up children and providing them with what they need. Then, as with young birds, the time comes for the young to leave. As

我认为父母和孩子们之间的相互理解是很重要的。父母花费时间、精力和金钱带大孩子们，给他们提供所需的一切。然后，年轻人就像小鸟飞离家一样离开了家。正如我们所说，所轻人长大飞走的一天是必然会到来的。尽管这时父母会感到难过，但是他们感情用事是不对的。