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通例， つうれい
1. custom, general rule, convention
2. usually, generally, normally, as a rule
tbd
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許可， きょか
1. permission, approval, authorization, license
许可、批准、授权、执照
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
