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浮気, 上気, うわき
1. extramarital sex, affair, fooling around
2. infidelity, wantonness, unfaithfulness, inconstancy, fickleness, caprice
tbd
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题;表示与另一选项(无论是否明确提及)形成对比;表示强调