Changes in climate before that period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.

在此之前，气候的变化导致了海平面的剧烈波动，恐龙因此灭绝。

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Changes in climate before the Cretaceous period caused severe fluctuation in sea level, resulting in the extinction of the dinosaurs.

白垩纪以前的气候变化导致了海平面的剧烈波动，引发了恐龙的灭绝。

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Climate fluctuation is one of the primary factors which influence the variation of runoff and sediment.

气候波动是影响径流、泥沙变化的主要因素之一。

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Fluctuation in the carbon dioxide of the air has helped to bring about major climate changes experienced by the world in the past.

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