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He quickly found than children as young as four months would learn to turn their heads to right or left if the movement “switched on” a display of lights—and indeed that they were capable of learning quite complex turns to bring about this, for instance, |
中文意思: 他很快发现,如果转头能使灯亮,四个月大的婴儿就会学着向右或向左转头,而且他们能够学会很复杂的转向动作以产生这种效果,例如,向左转两下或向右转两下,甚至向一边转三下。 |
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