SAT scores began dropping in 1963; today, on average, 30% of students do not complete high school in four years, a figure that rises to 50% in poor urban neighborhoods.

SAT 分数从1963年开始下降；今天，平均有30%的学生没有在四年内完成高中学业，这一数字在贫穷的城市社区达到了50%。

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They're told that their fears about crime in urban neighborhoods are somehow prejudice, 13 resentment builds over time.

当他们对城区犯罪活动的忧虑被说成是某种偏见时，埋怨便随时间逐渐累积。

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American soldiers spent seven years patrolling the urban neighborhoods of Iraq; its troops battled insurgents there block-by-block and house-by-house.

美国大兵在伊拉克的街头巷尾巡逻了整整7年，挨家挨户的与叛军对抗。

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Many urban neighborhoods are not conducive to keeping a car, which a long-time suburban dweller may be reluctant to give up.

FORBES: Personal Finance

Demographics and market trends arguably look positive too: consumers, even in the U.S., are gravitating toward urban neighborhoods where shopping and homes intermingle.

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But crashes that occur when vehicles travel at lower driving speeds in American urban neighborhoods are also a major problem, a new report found.

FORBES: In Crashes, Low Driving Speed Can Cause Serious Injury and Death to Pedestrians, Report Finds