Here in Oxford, you'll find arguably the most successful fusion experiment on Earth, JET, the Joint European Torus, torus being the technical term for donut, which is how the reactor's shaped.
在牛津,你会发现可以说是地球上最成功的聚变实验, JET,欧洲联合环面,环面是甜甜圈的技术术语, 这就是反应堆的形状。