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帰る， 還る， かえる
1. to return, to come home, to go home, to go back
2. to leave (of a guest, customer, etc.)
3. to get home, to get to home plate
返回，回家
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
