注释:
1. cell:cell phone 的缩写。
2. The new studies, lead-authored by Rutgers University, Newark, Economics Professor Peter D. Loeb ...第一作者为罗格斯大学纽瓦克分校的经济学教授 Peter D. Loeb 的新研究成果lead-author:第一作者;lead-authored 为动词的过去分 词形式,具有被动意义。罗格斯大学纽瓦克分校是美国新泽西州最负盛名的文理学院。
3. critical mass:临界数量。
4. factored in:包括,把计算在内。
5. a critical threshold:指的是前文所说的 critical mass。见注释3。
6. was canceled out:被抵消。
练习:
1. The two new studies, lead-authored by Professor Peter D. Loeb
A show that talking on the phone while driving or walking in the street increases deaths of drivers and pedestrians.
B show that talking on the phone while driving increases pedestrian deaths.
C recommend that strict measures be taken to restrain cell phone use.
D both A and C.
2. According to the second paragraph, when did cell phones actually help to reduce pedestrian and traffic fatalities?
A Right after cell phones were invented.
B Before the number of cell phone users reached a critical mass
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