discussant

1. As the discussant points out, parsimony of diagnosis is an important standard in modern medicine; however, this principle can fail us.
   正如讨论者所指出的，诊断的简约性原则是现代医学的一个重要标准；但是，这个原则可能使我们诊治失败。
2. In each class, one group presents the case, and the other group is the discussant.
   每堂课将有一组报告个案，另一组则加入讨论。

noun

1. a participant in a formal discussion