( )The meaning representation of words may change，becoming broader, narrower, or shifted．The word knight once meant “youth”，but was elevated in meaning in the age of chivalry；When Juliet tells Romeo，“I’m too fond.” She is not claiming she likes Romeo too much．She means “I am too foolish．”These are two examples of semantic broadening．

严肃与谨慎的关系是辩证统一、相辅相成的，是不可分割的整体。严肃要以谨慎为保证，谨慎要服从严肃的要求。 ( )