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経済的, けいざいてき
1. economic, financial
2. economical, thrifty, frugal
经济;经济的,经济上的
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