释义
n. 瞄准器(扼杀剂,消光杂质,屠刀,杀人者)
例句
1. The police chief spoke of his determination to catch the killer.
警长谈到他决意要抓获凶手。
2. The net result of the long police investigation is that the identity of the killer is still a complete mystery.
警方经长时间调查, 结果凶手的身分仍全然不知.