These resources are helpful in conveying basic business principles and examples as well as providing general advice in areas such as writing a business plan or marketing by direct mail.
这些资源可以提供基本的商业原则和案例，还可以提供一般的咨询建议，比如撰写商业计划书，直接邮递广告营销等。
The marketing letter should be accompanied by brochures and business CARDS for distribution and can be followed by other forms of direct mail.
市场营销信应附有小册子，分发名片，可以通过其他形式的直接邮件之后。
Apart from the two points, I think direct marketing is also important, direct mail, telephone, and the Internet are nowadays used by companies to promote a product.
除了以上两点，我认为直接营销也很重要，直接邮寄广告、电话和网络现如今被用来宣传产品。
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