The communication object relationship is different
Teachers have ups and downs, known unknowns; The relationship between lecturer and object is equal and collision, so it is also used in adult education.
Different teaching contents
What the lecturer said is personal experience, emotion and cognition, which may even be incorrect, with many deviations and no absolute answer. The teacher, on the other hand, talks about common sense, which is basically impossible to be absurd or misleading.
Different titles and occupations
A lecturer is a professional title among university teachers, or a lecturer in the training industry, or a host of class discussions. Teachers are specialized educators entrusted by a certain society (or stage) to train people, which is a profession.