好的，以下是增加的课文段落：Thestudentswereexcitedtolearnaboutdifferentculturesaroundtheworld.Theydiscussedhowpeopleinvariouscountriesgreeteachother.Somestudentssharedtheirownexperiencesofmeetingforeigners.Theteacherencouragedeveryonetorespectculturaldifferencesandbeopen-minded.Thisdiscussionhelpedtheclassunderstandtheimportanceofculturalexchangeintoday'sglobalizedworld.
