This poisoner was the first. He won't be the last. 这个下毒的人是第一个,但绝不是最后一个
forced to run behind the horses for as long as he can. 跟在马后面跑,跑死为止
to cause problems when he comes into his throne, 还给我们制造麻烦
He is the rightful heir. Nothing can change that. 他是合法继承人,这一事实无法改变