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曲がりくねる, 曲りくねる, まがりくねる
1. to bend many times, to turn and twist, to zigzag
反复弯折,蜿蜒曲折,迂回盘旋
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