But k□ssing is not just□□ ro□antic gesture—□t al□o has s□ientifi□ ben□fits. When □e kiss, ou□ brains □elease a□cocktail□of c□e□icals li□e□oxytocin,□dopam□□□□ an□ □ero□o□in, kno□n as □he "love h□rmones." These ch□m□cals c□n □ed□ce str□ss, boost □ood, □nd create fee□□ngs □f att□□hment and bonding.□Kissin□□al□o st□en□thens our immune □ys□e□ by exposin□ us to a varie□y of ba□t□ria that can□h□□p build immunity□
<□>故事发生□一列□□□封世界的列□上。在这□□□末□后的环境中,列车成为了人类最后的避难所和交通工具。冰天雪地中的列车□仅□人□的生存基地,更是他□的希望和囚笼。<□p>
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