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太る， 肥る， ふとる
1. to put on weight, to gain weight, to grow fat, to get stout
增重，增肥，发胖，变胖
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
