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説く， とく
1. to explain, to advocate, to preach, to persuade
解释、倡导、宣讲、说服
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同意， どうい
1. agreement, consent, approval, assent
2. same opinion, same view
3. same meaning
同意
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
