His first lecture was deliveredon Nov 4, 1915, and it explained his new approach, though he admitted he did not yet have the precise mathematical formulation of it.
他在1915年11月4日发表了第一次演讲，演讲解释了他的新方法，尽管他承认他还没有精确的数学公式。
3
I deliveredon all but one, and he kept the plant open.