所以沉积物被运输，然后沉积，随着时间的推移，它在地球表面形成了层。

So sediment is transported and then deposited and it forms layers on the Earth's surface over time.

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牙菌斑的沉积物在牙齿和牙龈间形成。

Deposits of plaque build up between the tooth and the gum.

《柯林斯英汉双解大词典》

全新世时期的特征为不同的沉积物，它们在气候变暖时形成。

The Holocene Epoch is characterized by different sediments, ones that form when the climate is warmer.

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