交锋: to cross swords, to have a confrontation (with sb)...
小区: neighborhood, district...
侄子: brother's son, nephew...
闻名: well-known, famous, renowned, eminent...
证人: witness...
靴子: boots...
有效: effective, in effect, valid...
足迹: footprint, track, spoor...
翻番: to double, to increase by a certain number of times...
