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.

join工具必须要在所操作的文件之间找到共同的域，默认情况下，它期望这个共同的域就是第一个域。

youdao

Whitcomb also has worked with wolf spiders, a common field variety averaging about the diameter of a quarter.

惠特科姆也研究过狼蛛——一种平均相当于二角五分硬币直径的常见田间品种。

youdao

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.

我认为这一转变是很有意义的，因为激素替代治疗(我的演讲主题)是一个妇产科学和内分泌学方面的重要问题。

youdao

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.

我认为这一转变是很有意义的，因为激素替代治疗(我的演讲主题)是一个妇产科学和内分泌学方面的重要问题。

youdao