VOA慢速英语:美国研究称高中毕业生有很多好工作

bachelor's degree – n. a degree given to a student by a college or university usually after four years of study

automation – n. the control of something using machines and not people

decline – v. to become less in amount, importance, quality or strength

installer – n. person whose job is to put things in position and make them ready for use

plumber – n. someone whose job is to supply, connect, and repair water pipes and devices