Titan's oblateness may also help explain why its methane lakes are concentrated near the poles.

泰坦的扁圆形也可以帮助解释为什么它的甲烷湖集中在极地附近。

youdao

Scientists think mercury atoms may "hop" across the surface of the Moon towards the poles, causing them to be concentrated in these regions.

BBC: Nasa reveals new information about moon probes crash sites