contrail
... contragradation阻塞堆积 contrail凝结尾流 contrapolarization反极化 ...
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有官员说,美国五角大楼无法解释星期一傍晚在加州南部出现的类似于高空发射火箭后产生的凝结尾流。
The Pentagon is unable to explain images of what witnesses took to be a high-altitude rocket launched off the coast of southern California at sunset Monday, officials said.
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