1·When the dreaming state of REM sleep was discovered in 1951, it was described as a "new continent in the brain" [source: Schaffer].
当1951年快速眼动睡眠状态被发现的时候,它被描述成“大脑的新大陆”【来源:谢弗】。
2·There are several studies that show that learning can't take place without sleep to reinforce the knowledge [source: Schaffer].
一些研究显示,没有睡眠的学习不可能巩固知识【来源:谢弗】。