It is against this background that the additional and superimposed effects of fluctuations of investment in durable goods must be examined.

正是在这种背景下，必须研究耐用品投资波动的附加和叠加影响。

Since some scientists believe that periods of drought will become more common due to climate change, this could mean that greater rates of sinkholes could be an additional side effect of our changing climate.

由于一些科学家认为，由于气候变化，干旱时期将变得更加普遍，这可能意味着更大的天坑率可能是我们气候变化的额外副作用。