倒数第三张图是错的吧?
If you had one negative number in it, then the product would be a negative number and, if you took a root of that, then you might get an imaginary number.如果这当中有一个负数,乘积就会变成负的,如果你对一个负数开根号,你就会得到一个虚数。
The universal gravitation field is described by imaginary number in the paper. It's energy density is negative real number. And it accord with conservation of energy.采用虚数场描述万有引力场,其场能密度是负实数,满足能量守恒定律。