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始まる， はじまる
1. to begin, to start, to commence
2. to happen (again), to begin (anew)
3. to date (from), to originate (in)
开始；再次发生，重新开始；起源于
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
