在许多实例中，这些类别沿着从简单到复杂的演进路径或层次下降。
And, in many instances, the categories fall along an evolutionary path or hierarchy that proceeds from the simple to the complex.
梦游者可以做出很多不同的动作，从简单的起床在房间里四处走动到驾驶汽车或演奏乐器。
Sleepwalkers are capable of performing a variety of activities, from simply getting up and walking around the room to driving a car or playing an instrument.
他们的生命完全无意义以致他们无法从简单的快乐中——像读书、骑自行车或和朋友在一起呆一天——得到乐趣？
Are their lives so wholly meaningless that they're unable to take joy from simple pleasures, like reading a book, riding a bike, or spending a day among friends?
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