they formed an arc of instability from Belarus in the north-east, round the Caucasus and along North Africa to Morocco.

它们形成一个不稳定的拱形，从东北部的白俄罗斯，绕过高加索山脉，顺着北非一直延伸到摩洛哥。

youdao

Because of this instability, it's very difficult to store elements as Stark does in his arc reactor: They need to be moving at nearly the speed of light.

由于这种不稳定性，人类很难做到像斯塔克那样将新元素储存在他的方舟反应堆中，再说电影中它们还需以接近光速被移动。

youdao

Indonesia sits on the volatile "Ring of Fire," an arc of seismic instability around the Pacific rim.

印尼即坐落在极不稳定的“火山带”上。这条火山带呈弧形，围绕着太平洋周边地区，充满了地质不稳定。

youdao

The danger, it is now assumed, lies in what Pentagon officials call an "arc of instability" that runs through the Caribbean Rim, Africa, the Caucasus, Central Asia, the Middle East, South Asia and North Korea.

CENTERFORSECURITYPOLICY: Rebasing -- and Reequipping -- for Transformation