后带太长backstrap: 背部腰带; 后带; 脊框; 手枪枪身后部backstrap too low: 后带太低backstratoo hight: 后带太高backstratoo short: 后带太短backstreaming: 回流; 逆流; 托底单向流下载手机词典可随时随地查词查翻译