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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
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$firstVoiceSent
- 来自原声例句