我似乎還記得琳達·麥克弗利（Linda McFly）的運動衫（在度假照片中）有時是1984年，有時是1991年？我沒有屏幕截圖，也無法在網上找到任何相關信息。是那樣的還是我看到的東西？
Linda McFly的運動衫上的年份
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back-to-the-future
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Futurepedia says that she did graduate from Hill Valley High School in 1984.
Regarding the actual photograph, see it here with Craig vanished. It's a little bit clearer and looks a little more like '84'
Bear in mind that it can't be '91', because quite simply that Marty came from 1985 - how could he have a photograph of his sister wearing a sweatshirt with 'Class of 91' if he was only from 1985!