But the most cutting-edge tool under development is the "teachable agent" —a computerized character who learns, tries, makes mistakes and asks questions just like a real-world pupil.
2018年6月四級(jí)真題（第三套）閱讀 Section C
Student tutors feel upset when their teachable agents fail, but happy when these virtual pupils succeed as they derive pride and satisfaction from someone else's accomplishment.