The goal of doing short presentation in class is to supplement the materials
in class.

For every class, we have 2 students present. They can do the presentation
separately (7min's presentation + 3min's Q&A), or they can work together for 1
long presentation (15min's presentation + 5min's Q&A). The Topic of the
presentation does not necessarily related to the topic discussed on that day,
but it should be related to what we discussed during the whole semester. Also,
please focus on looking at the concrete applications in practice, instead of
just talking about some topic in general.