Finally, four army group headquarters were formed. The 6th and 12th Army Groups served in the ETO and the 15th Army Group in the MTO.是什么意思_Finally, four army group headquarters were formed. The 6th and 12th Army Groups served in the ETO and the 15th Army Group in the MTO.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句