Part Three (Chapter Two) focuses on the reasonable factors in the Sapir-Whorfhypothesis and expounds the influence of linguistic system and structure on thought.

• 第三部分（第二章）：探讨萨皮尔-沃尔夫假说的合理成份，该假说提出的语言从语言系统和语言结构两方面影响思维具有一定的理论价值。