Market researchers often segment the population on the basis of age and social class.
市场研究人员常常按年龄和社会阶层划分人口。
《牛津词典》
2
This segment of the middle class may lack the gumption to expand their businesses, or perhaps they know something about their prospects that their cheerleaders do not.
中产阶层中的部分人也许缺乏扩大自己经营的进取心，或者，也许他们知道一些旁人并不知道的事情。
3
The first of these is the handler panel at the top of the code segment, which is a wrapper for a div tag with the class panel.
第一个助手是位于代码段顶部的处理程序 panel，这是带有 panel 类的 div 标记的包装器。