Those sightings are then analyzed for interesting patterns, such as changes in species or long- term trends in population sizes.

然后，对这些发现进行分析，寻找有趣的现象，如物种变化或种群大小的长期趋势。

The good news is that if we zoom out and look at absolute mobility across the years, the long term trend in social mobility is upwards.

好消息是，如果我们放大观察多年来的绝对流动性，社会流动性的长期趋势是向上的。