Experts still can't say for sure where the symbol actually got started.

专家们仍然不能确定这个符号到底起源于哪里。

But there is probably an element of symbols already starting to be incorporated a little bit, but Greg would have to answer that.

但是可能有某个符号元素已经开始被融入了一点，但是格雷格必须回答这个问题。