求翻译：伊朗上周宣布，在靠近阿富汗东部地区击落一架美军RQ—170哨兵无人侦察机。并在12日称伊朗技术专家正加紧破解RQ—170无人机的加密资料，已经进入“最后阶段”。是什么意思？

Iran announced last week in eastern Afghanistan near the U.S. military shot down an unmanned reconnaissance RQ-170 Sentinel. And 12 technical experts that Iran is stepping up its UAV RQ-170 crack encrypted data, has entered the "final stage."

正在翻译，请等待...

Iran announced last week that, is approaching the Afghan eastern area to shoot down a United States military RQ-170 sentry nobody reconnaissance aircraft.And in 12th called Iran the technical expert is stepping up to explain the RQ-170 unmanned aerial vehicle the encryption material, already entered

Iran announced last week, close to the Afghanistan shooting down of a US military RQ-170 in the eastern sentinel UAV. On 12th and said Iran expert was gearing up to crack the encryption information RQ-170 UAV, has entered the "final stages".

Iran announced last week, were shooting down an American army RQ-170 sentry's unmanned reconnaissance plane close to east of Afghanistan area. And claim Iranian technologist is stepping up analysing and explaining the encryption materials of RQ-170 unmanned aerial vehicle on the 12th, have already e