Where children once scrambled over rocks to explore haunted caves, now they climb on cement tetrapods.
昔日孩童们攀爬岩石、探索闹鬼岩洞的地方，现如今已变成只能供他们爬楼梯的水泥四角物了。
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Many primitive lineages went extinct as sharks and bony fish became masters of the waters and tetrapods, the four-legged animals that eventually evolved into dinosaurs and mammals, conquered the land.