He finds that rates of joblessness differed primarily according to class: those in middle-class and white-collar occupations were far less likely to be unemployed.
他发现，失业率主要根据阶级不同而不同：中产阶级和白领阶层失业的可能性要小得多。
2
So future phones might simply be able to lip-read using a sensor hidden in your collar.
所以未来的电话可能只要在你的衣领下藏个传感器，它就能读懂你的唇语。
3
These can now be delivered electronically from anywhere in the world, exposing skilled white-collar workers to greater competition.