永不放弃_2000字，坚持不懈

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i have to not boring to walk cycles. fifteen minutes passed， i want to back down. well， perseverance will be successful.remember that year， "learning bicycle，永不放弃_2000字， my mother said to me ": well， perseverance will be successful. like what you do is a

温馨提醒：随时光变迁，文中所陈述观点；准确性、难免有所变动，因此文中观点仅供参考。