That had to be on or about November 29th, 2013.
Because that was the top of the parabola.
那必须是2013年11月29日左右。
因为那是抛物线的顶端。
That had to be on or about November 29th, 2013.
Because that was the top of the parabola.
那必须是2013年11月29日左右。
因为那是抛物线的顶端。