translation.en: So Kaluza said to himself, Einstein has been able to describe gravity in terms of warps and curves in space -- in fact, space and time, to be more precise.
translation.zh: 所以“卡鲁扎”自认为， “爱因斯坦”能够用扭曲的空间来 描述“重力”-- 更精确的来说，用空间和时间。