Today, America faces a make-or-break moment for the middle class. After the worst economic crisis of our lifetimes, some still want to return to the same policies that got us into this mess. They’re t
our future: a battle between dreams and reality good morning teacher: when i was in the primary school, i have a dream. i want to be a scientist to be remember, when i was in the secondary sch
What about sleep? In slow-wave deep sleep, our glial cells rinse cerebral spinal fluid throughout our brains, 关于睡眠呢？在慢波深度睡眠时，我们的神经胶质细胞冲洗着我们大脑中的脑脊液， clearing away metabolic waste that accumulated in ou
Eugene Debs Your Honor, years ago I recognized my kinship with all living beings, and I made up my mind that I was not one bit better than the meanest on earth. I said then, and I say now, that while
