It consists of concentric semicircles of a polymer laid down on a gold film.
由一个同中心的半圆聚合物放置在金制膜层上构成的。
It is only recently that researchers have started looking at the strange squiggles, semicircles, lines and zigzags that surround them.
只有到了现在，研究人员才刚刚开始观察石壁上那些奇怪的胡乱书写的文字、半圆图形、线条和锯齿形。
When faced with such spectacular beauty, who could blame the visiting anthropologists for largely ignoring the modest semicircles, lines and zigzags also marked on the walls?
