We're going to talk as we go through about the concept of stem cells and how stem cells are related to development and what's so special about stem cells.
在以后的课程中我们会学到,干细胞的概念,干细胞和发育的关系,以及干细胞的特殊之处
You'll read more about it in the Peter Gray textbook and more about it in The Norton readings on development, but just to raise this as an interesting area of debate.
你会在彼得·格雷的教材,以及诺顿读本的发展心理学部分,阅读到更多该方面的内容,我说这个只是想将此作为,一个有趣的辩论内容
These conditions permitted a development of institutions and habits needed for freedom, even as they also made Europe vulnerable to conquests and to extinction, and Europe was almost extinguished practically before there was a Europe; very early in its history.
这些恰恰是自由的形成和发展,需要的的制度和特征,尽管这也使欧洲,在外敌入侵时变的不堪一击,实际上,在它早期的历史中,欧洲在尚未形成前就差点消失
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