语法改错精解199页

语法改错精解199页。Chinese, the most ancient of living writing systems, consists of tens of thousand os ideographic character, each character a miniature calligraphic composition inside its own square frame.

划线部分读不明白。a miniature calligraphic composition inside its own square frame.

是each character的同位语？？

a miniature calligraphic composition inside its own square frame是each character的同位语，你在中间加上is看看，

each character (is) a miniature calligraphic composition inside its own square frame.