The al Thagher Model school showcased Faisal's interest in science and Western methods of education; in the nineteen-sixties, it was the only school in Jedda with air-conditioning.
In all three of America's biggest cities, murder rates have fallen to their lowest levels since the nineteensixties.
在所有美国三个最大城市中,凶杀案的比率已经降到上世纪六十年代以来的最低点。
3
Modern rice plants produce two to three times more grain than was possible before the nineteensixties. But they also require large amounts of water, chemical fertilizers and pesticides.