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相手, あいて
1. companion, partner, company
2. other party, addressee, counterparty
3. opponent (sports, etc.)
对方;伙伴;对手
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