The virus is thought to have circulated for a month and disappeared.The source of the virus, the exact time of its introduction into Fort Dix, and factors limiting its spread and duration are unknown.是什么意思_The virus is thought to have circulated for a month and disappeared.The source of the virus, the exact time of its introduction into Fort Dix, and factors limiting its spread and duration are unknown.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句