The year 1968 marked a high water mark in the Vietnam War, when troop strength swelled to half a million and the Tet offensive undermined the U.是什么意思_The year 1968 marked a high water mark in the Vietnam War, when troop strength swelled to half a million and the Tet offensive undermined the U.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句