内容简介：毅力，是春蚕吐丝一缕一缕地环绕，一丝丝地坚持，才有破茧而出重见光明的辉煌；毅力，是千里大堤一沙一石地凝聚，一点点地累积，才有前不见头后不见尾的壮丽；毅力，是万丈高楼一砖一瓦地重叠，一层层地攀升，才有居高临下极目远眺的风光。( Brief introduction: Perseverance is like butterfly emerging from a chrysalis to see bright brilliance again by wisps of silkworm thread around and persistence little by little. Perseverance is like glorious spectacular by coherence of sands and stones in thousands miles of bank and accumulation little by little. Perseverance is like overlooking landscape by overlapping of blocks and bricks in skyscraper and ascending layer by layer.)