New words：

fossil /ˈfɒsl/ n.化石；老人；老古董

必记高频搭配

fossil fuel 化石燃料（煤、石油、天然气）

Burning fossil fuels produces greenhouse gases.

plant/animal/dinosaur fossils 植物 / 动物 / 恐龙化石

This museum has many ancient plant fossils.

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