Was President Kennedy killed by a lone gunman, or was there a conspiracy?刺杀肯尼迪总统是独行枪手所为，还是一项阴谋？The woods are never entirely safe for women on their own.对独行的女子来说，这片树林从来都不怎么安全。He was shot by a lone gunman.他被一个独行枪手射杀。A lone gunman burst into his house and shot him dead.一名独行的持枪歹徒闯进他的屋子，开枪打死了他。