回复浠よ儭鍐�
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> 浠よ儭鍐� wrote: >>xw wrote: >> >>Gradually, the Indian origin of positional notation was forgotten in the West, and only its immediate source was remembered. Thus, the Indian digits became known as Arabic numberals and the zero was thought to be an Arabic invention. The Ar...
用两个手指一起，可以上下滑动文本编辑区。