1. The join utility must find a common field between the files in question, and by default it expects that common field to be the first.

2. And, to maintain and stipulate the common field and personal field is the effective way to realize legal modernization.

3. For example, for a matrix, the most common field is the translation field.

4. join works only if the files being joined share a common field.

5. This article explores democracy web dissemination which is the special form in the common field of modern society.

6. And I think it's important to see this because hormone replacement therapy------ the topic of my lecture is an important issue in our both common field in gynecology and endocrinology.