That speed is also too fast to be explained by a phenomenon called true polar wander, in which the Earth's entire crust and mantle reorient, moving a different geographic region to the North Pole.

这一速度太快了而同样无法用真极移现象解释，真极移理论认为地球的整个地壳和地幔都在不断调整，将一个完全不同的地理区域移到了北极。

youdao

The transition zone seems to be slightly thinned which might indicate a higher mantle temperature in this region.

过渡区似乎稍微变薄，这可能表明这个区域的地幔温度较高。

youdao

The CMB is not only the medium transferring thermal energy from core to mantle, but also the region in which the temperature and temperature gradient is the highest in the whole mantle.

地幔底层是地核热能向地幔传播的必经之路，也是地幔中温度和温度梯度最高的地区。

youdao

And within the context of the unrest we've seen in the region, it would obviously be a healthy development that someone who claims the mantle of leadership and yet brutalizes his own people ruthlessly be removed from power or remove himself from power -- that would be a positive development, within the context of the unrest that you're referencing.

WHITEHOUSE: Press Briefing