他们精通好的书信格式。

They know how to write good letter forms.

英文书信的格式就和信封地址一样，也可分为平头式和缩进式两种。

Similar to the form of the address of the envelop, the form of the letter can also be divided into block form and indented form.

这是供你熟悉掌握简短的询盘书信的一般格式。

This is a short and simple letter of enquiry for you to get acquainted with the general form.