其中一种设计是，宽阔的人行道环绕，家人和孩子可以结伴同行，能够减少对犯罪的恐惧。
In one, wide sidewalks ring the perimeter so families and kids can walk in groups with less fear of crime.
他们用三项研究探索了这个理论，其中两项关于助人行为，一项关于侵犯。
They explore this theory with three studies, two on helping behaviours and one on aggression.
博佐洗掉了人行道上他作的画，数了数收入——有十六先令左右，他说其中十二三先令是赚头。
Bozo washed his pictures off the pavement and counted his takings-it was about sixteen shillings, of which he said twelve or thirteen would be profit.
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