sides convex to concave
从凸到凹的侧面
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Both sides of the cliffs seem to echo each other, forming into one concave and one convex, like it is split by an enormous axe. Water running through it forms into a waterfall and pool.
左右两侧绝壁一凹、一凸相互呼应，像是被一把大斧硬生生劈开，大水从中流过形成一道由瀑布、深潭串连而成的壮丽峡谷。
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