This lab meeting is holding with propose for you guys to practice seminar/present your lab results. This will wrap up your confidence and works all together at the same time.
Again, our rule is "Presenter can speak in Thai while the rest -have to- speak in English unless you could not find any words to explain what are you thinking/would like to talk or asked".
Please do not be shy. I try to hold up because you will have a floor to practice your English as well - take this chance or you lose it!!.