Piaget's example would be a baby who's used to sucking on a breast might come to suck on a bottle or on a rattle.
皮亚杰举例说,一个习惯吸吮乳房的婴儿,可能会去吸吮奶瓶或是拨浪鼓
What if a child was never breast fed, but fed from the bottle from the start?
如果孩子从未接受过母乳喂养,而是从小就用奶瓶喂养,那又会怎样?
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