Please translate the following paragraph into Chinese. Content analysis methods may be applied to virtually any form of communication. Content analysis is conducted by systematically analyzing social artifacts such as books, magazines, poems, newspapers, songs, paintings, speeches, letters, and laws, as well as any components or collections thereof. For example, a researcher may want to find out whether European history textbooks are more sexist than UShistory textbooks. The researcher would then sample both European and US history textbooks. The next step would be to develop a code sheet that would aid in measuring whether or not some language is perceived as sexist. After the code sheets are tabulated and analyzed the researcher is then able to draw conclusions.