mining area class 矿区类型
Middle-class area 中产阶级居住区
Class area 斑块类型面积 ; 类型面积
proportionate area by age class [林] 龄级比例轮伐面积
CSS class for zoomed area 放大图像的边框样式
World-class cultural scenic area 世界级文化景区
Area of class 类型的数量
The post office has promised to resume first class mail delivery to the area on Friday.
邮局已承诺在星期五恢复该地区第一类邮件的递送。
The area contains a disproportionate number of young middle-class families.
此地年轻的中产阶级家庭特别多。
Ideas about social class—whether a person is "working-class" or "middle-class"—are one area in which changes have been extremely slow.
关于社会阶级的观念，判断一个人是“工人阶级”还是“中产阶级”，这是一个极其缓慢的变化过程。
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