Later on I'll be speaking to Patty Davis.
以后我会和帕蒂·戴维斯谈谈。
Patty Davis looks at the new technology that could make that happen.
帕蒂·戴维斯带您看看能令这一愿望实现的新技术。
The U. S. Department of Transportation says it wants to save drivers' lives. Patty Davis looks at the new technology that could make that happen.
美国交通部称,它想挽救司机的生命。帕蒂·戴维斯带您看看能令这一愿望实现的新技术。
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