This group of petroglyphs in the Alta Fjord, near the Arctic Circle, bears the traces of a settlement dating from c. 4200 to 500 B. C.

临近北极圈阿尔塔海湾的这组岩画是公元前4200年至公元前500年人类居住遗迹的见证。

youdao

So this is a circle, and it comes to a halt, let's say here at point C.

这是一个圈，它会在比如说，点C停下来。

youdao

R So if C is the circle, R is the disk of radius A.

就是C所包围的区域。，Well，，R，is，the，region，enclosed，by，C。,如果C是一个圆，R就是半径为a的圆盘。

youdao

The uptrend was tested twice more in November (circle F) before IYE was able to rally impressively through resistance at line C on strong volume (line G).

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