1. The uniting of the world around the AIDS epidemic is without prior example.
    全世界因艾滋病这一流行性疾病而联合了起来，这是前所未有的。

2. No prior knowledge should be required.
    不需要预先学得什么知识。

3. At the trials, one month prior to the finals, I took first place on the ten-meter platform and on the springboard!
    在决赛一个月前举行的预赛中，我获得了十米跳台和跳板的第一名！