Seo noted that the rotational pole changes caused by groundwater are too small to affect Earth's seasons.

徐指出，地下水引起的自转极变化太小，不会影响地球的季节。

Scientists have known for more than 100 years that the Earth's poles change position a little over time with what is called polar motion.

100多年来，科学家们一直知道，地球的两极会随着时间的推移而稍微改变位置，这就是所谓的极移。