Snidman and colleagues at Harvard Medical School have tracked infants to their college years, and know that babies who react very negatively to new people and objects tend to grow into shy children.
斯尼德曼和哈佛大学医学院的同事们从婴儿期跟踪至大学时代，发现那些十分消极应对新人和新物的婴儿日后会成为害羞的孩子。
Although babies are born utterly helpless, within a few years they've mastered everything from language - a toddler learns 10 new words every day - to complex motor skills such as walking.
虽然刚出生时婴儿是完全无助的，出生后的几年之内，他们就已经能够掌握从语言到肢体技能的一切。一个三岁的孩子，每天能学会10个新词，能做像走步一类的复杂的身体运动。
Although babies are born utterly helpless, within a few years they've mastered everything from language - a toddler learns 10 new words every day - to complex motor skills such as walking.
虽然刚出生时婴儿是完全无助的，出生后的几年之内，他们就已经能够掌握从语言到肢体技能的一切。一个三岁的孩子，每天能学会10个新词，能做像走步一类的复杂的身体运动。
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