到6个星期大时，大多数婴儿开始表现出近似于日夜分明的睡觉模式。By about 6 weeks of age, most babies begin to show something approximating a day/night sleeping pattern.神经元的本体, 其作用近似于一种线性阀值器件.The body of a neuron. Acts approximately as a linear threshold...
Erica was friendly and chattered about Andrew's children.埃丽卡很和气，不停地念叨着安德鲁的孩子们。Erica was solemn, pulling at her blonde curls.埃丽卡表情严肃，扯着自己卷曲的金发。Erica made a little deprecating shrug.埃丽卡有点不以为然地耸耸肩。...