笑声与泪水
□引言
□□□>□ut kissing□□s □□t just a □o□antic gest□r□—it al□o h□s scien□ific benefits.□When we kiss, our brains□re□e□se a□□□cktail of chemica□s like oxy□ocin, dopamine,□and s□ro□onin,□kno□□ as the "love □ormo□es." These chem□cals c□n reduce stress, bo□st□m□od, □nd creat□ f□eli□gs o□ a□tachme□t□an□ b□ndi□g. Kissing also□s□ren□thens□our immune □ystem by exposi□g □□□to□a variet□ of bac□eria that □an□help□bui□d imm□nity.□□p>
四、神□双龙现身冰与□的传说