Textbook publishers connect professors, instructors and students in ways that alternatives, such as open e-textbooks and open educational resources, simply do not.
2019年12月四級真題（第三套）閱讀 Section C
英語六級真題
Professor sometimes implement policies designed to minimize?students' use of digital devices, and some instructors even confiscate tablets and phones.
2018年12月六級真題（第二套）閱讀
柯林斯高階英漢雙解學習詞典釋義
N-COUNT
教練;指導者;(美國英語亦指)教師，大學講師
An instructor is someone who teaches a skill such as driving or skiing. In American English, instructor can also be used to refer to a schoolteacher or to a university teacher of low rank.