Invisible under the stars,an ummanned American spy plane circled inaudibly over a stretch of dark landscape,transmitting grainy images back to the United States.是什么意思_Invisible under the stars,an ummanned American spy plane circled inaudibly over a stretch of dark landscape,transmitting grainy images back to the United States.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句