我必须谈谈恐惧。它是生命唯一的真正对手。只有恐惧才能击败生命。

Every child should have mud pies, grasshoppers, water bugs, tadpoles, frogs, mud turtles, elderberries, wild strawberries, acorns, chestnuts, trees to climb, brooks to wade in, water lilies, woodchucks, bats, bees, butterflies, various animals to pet, hayfields, pine-cones, rocks to roll, sand, snakes, huckleberries and hornets; and any child who has been deprived of these has been deprived of the best part of education.

可能近似正确（PAC）学习的概念在计算学习理论中具有基础性意义。

The process of perception is not a simple matter of recording sensory data but involves the active organization of that data into meaningful patterns.

我相信粉色。