警察: police, police officer...
干什么: what are you doing, what's he up to...
模型: model, mold, matrix, pattern...
学者: scholar...
路口: crossing, intersection (of roads)...
手动: manual, manually operated, manual gear-change...
搜集: to gather, to collect...
肚子: belly, abdomen, stomach...
记忆: to remember, to recall, memory...
无奈: to have no alternative, frustrated, exasperated, helpless, (conjunction) but unfortunately...
