探险队采集的样品揭示了沉积物层之间化学成分及化石分布上的重大差异。
Samples recovered from the expedition revealed important differences in chemical composition and fossil distribution among the sediment layers.
而那时和现在之间有重大差异。
两组减肥者的重大差异在于行为。
The big differences between the two groups involved behaviors.
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