There is a long history of vocational education in this country.
美国这个国家的职业教育有着很长的历史。
2
It introduced the research history, concept and occupational risk factors of vocational exposure.
介绍了职业暴露的研究简史、概念及职业危险因素。
3
Based on the author's teaching practice in a vocational college, the essay displays the reformation in the education of chemistry history in chemical engineering specialty.