Sapir-Whorf hypothesis consists of two parts: linguistic determinism and linguistic relativity. Linguistic determinism refers to the notion that a language determines certain nonlinguistic cognitive processes. Different languages offer people different ways of expressing around, they think and speak differently. Linguistic relativity refers to the claim that the cognitive processes that are determined are different for different languages. Thus, speakers of different languages are said to think in different ways. The hypothesis is now interpreted mainly in two different ways: a strong version and a weak one. The strong version believes that the language patterns determine people’s thinking and behavior; the weak one holds that the former influence the latter. So far, many researches and experiments are conducted to provide support for the weak version.