3根据举例猜测词义
恰当的举例能够提供猜测生词的重要线索，例如：
The consequences of epochal events such as wars and great scientific discoveries are not confined to a small geographical area as they were in the past.
句中“战争”和“重大科学发现”是生词的实例，通过它们我们可以猜出epochal的大致词义“重要的”，这与其确切含义“划时代的”十分接近。
