kètáng zhǎnshì bù yídìng yāoqiú hěn zhèngshì, dàn jīběn shuōmíng shì hǎo xíguàn

课堂展示不一定要求很正式，但基本说明是好习惯。

Classroom presentations do not necessarily need to be very formal, but providing a basic explanation is a good habit.