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1·Is there a definitive link between climate change and more earthquakes?

气候变化和更多的地震中有没有明确的联系？

2·Further studies, including those with weight-loss interventions, experts say, are necessary to confirm a definitive link between obesity and pregnancy complications.

专家们也认为需要进一步研究（包括减肥的影响）来肯定肥胖和怀孕综合症之间存在必然关系。