The revolution is based on the work of scientists who study the movement of the continents a process called plate tectonics.
VOA: special.2010.01.12
You need to pin down an object of study, a first principle from which other principles can emerge, and part of the process is to say, "Hey, it's not literature we're talking about.
首要原则是,需要锁定要谈论,即学习的目标,可是,谁知道什么是文学。
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