Dreams take up about one quarter of our sleeping time.
做梦大约占我们睡眠时间的四分之一。
2
Since we only take one step at a time, there is no need to plan our route for one can make continuous decisions about where to turn next.
既然我们一次只走一步，就没有必要计划我们的路线，因为一个人可以不断地决定下一步去哪里。
3
This argument is specious; it is a little like saying that since we only take one step at a time there is no need to plan our route since one can make continuous decisions about where to turn next.