本视频对应复杂句子分析实践案例：
- Warning that computers in the United States are not secure, the National Academy of Sciences has urged the nation to revamp computer security procedures, institute new emergency response teams, and create a special nongovernment organization to take charge of computer security planning.
- Retail sales rose 0.8 of 1 percent in August, intensifying expectations that personal spending in the July–September quarter would more than double the 1.4 percent growth rate in personal spending for the previous quarter.
