They have nothing to compare it to. 没有任何比较。 When these villagers claimed their freedom, 如果这些人要为自己争取自由， the slaveholders burned down all of their houses. 奴隶主就烧掉他们所有的房子。 I mean, these people had nothing
帕特里夏·库尔讲了有关婴儿学习不同语言的惊人发现，婴儿聆听围绕在他们身边的人类声音并对他们要知道的声音做统计。精巧的室内试验和脑部扫描呈现6周大的婴儿如何使用复杂的统计推理来感知世界。这可能就是为什么少儿英语这么火的原因了。 patricia kuhl: the linguistic genius of babies 婴儿的语言天赋 i want you to take a look at thi
Before we begin this examination, I would like you to imagine a national coin-flipping contest. Let’s assume we get 225 million Americans up tomorrow morning and we ask them all to wager a dolla
