Nowadays, the main approach of spreading spam is in a letter form, so this thesis focuses on content-based indexing of spam filter.

He was worried because he hadn't had any letter form his child.

他很着急，因为他一直没有收到他孩子的信。

I received an unsigned letter dated form May5th, 1972.

我接到一封注明1972年5月5日但没属名的信。

English teaching should focus on cultivating students ′ habit of preparation before class, form good reading habits and skills. Meanwhile, students should learn to develop internet resources and pass information by letters.

要培养学生具备这些能力，在英语教学中必须培养学生良好的预习习惯，养成良好的阅读习惯和技巧，让学生学会开发网络资源，学会用书信形式传递信息。

The book is written in the form of letters to the writer's son.

这本书以给作者儿子的书信形式写就。

This not only redistributed Americans – some doubtless on business trips to Indianapolis – in a manner he thought unnecessary. It also stimulated written communication in the form of letters.

这条铁路不仅是用一种他觉得没有必要的方式把美国人重新分配到各个地方（其中一些人无疑是在前往印第安纳波利斯的商务旅行的途中），还刺激了书信形式的文字交流。

Help him track down the dirty dog by following'scents'left behind!

来帮助它通过气味追踪那个坏蛋！

That dirty dog tried to cheat me!

那个寡廉鲜耻的家伙企图欺骗我！

You dirty ie dishonourable dog!

你这个无耻的小人！

While he was going back home, a dirty dog followed him ．

回家路上，一只浑身脏兮兮的狗跟着他。

Your partner is a dirty dog.

你的合伙人是个卑鄙小人（坏小人）。

When we look at the tobacco industry, we see that you really can teach a dirty old dog some new tricks.

当我们审视烟草业时，我们看到，陈旧的行业真的可以耍弄一些新花招。

He's a dirty dog.

他是一个肮脏的人。

You dirty dog!

你这个下流坯！

The dirty dog, in the shape of a gentleman known as the Colonel, was lurking slyly in the background, and our heroine spent the greater part of her Baltimore time in this scoundrel's company.

第三者，那位被称为“上校”的人，诡秘地隐藏在幕后，我们的女主角在巴尔的摩的大部分时间都陪在这个恶棍的身旁。

No, I would never keep such a dirty dog.

不，我不会养一只如此肮脏的狗。

" He's a dirty dog," Father Rank said, with a kind of relish.

他是一条癞狗，兰克神父带着某种欣赏的语气说。

There are always three main characters& the husband, the wife, and the dirty dog.

总会涉及三个主要角色&丈夫、妻子和第三者。

Prophesy: He Qi-fang's First Personal Collection

《预言》：何其芳的第一部个集

The following items are all autographed by Anita Mui personally, and they are personal collection of one of her devoted fans.

以下种种全是一位痴心梅迷的私人珍藏。因阿梅的亲笔签名，每件物件已升值为无价宝。

The video was discovered in the singer's personal collection and is thought to be the only copy of the performance, the estate said.

遗产委员会表示，该视频发现于杰克逊的藏品中，可能是此次演出的唯一录像。