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VOA慢速英语:美国许多州教师短缺
qualified – adj. having the skills or experience in order to do something
certification – n. an official document attesting to a status or level of achievement
counter – v. react to something with an opposing opinion or action
standard – n. something that others of a similar type are compared to or measured by; the expected level of quality
licensure – n. the state or condition of having a license granted by official or legal authority
obvious – adj. easily seen, recognized, or understood
pipeline – n. a process or channel of supply
enroll – v. sign up for or join an activity or program
credentials – n. documents stating the abilities and experience of a person to prove the person is qualified for a particular job