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Scientific
containing
fossils
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Chinese
date a
fossil
确定化石的年代
discover
fossils
in the lowest level of rock
在岩石的最底层发现化石
Most of the world's energy is supplied from
fossil
fuels.
世界上的大部分能源来自化石燃料。
The harder and more altered the rock, the more difficult it is to find the delicate remains of the
fossils
.
岩石越坚硬、变化越多、发现微小化石遗迹就越困难。
These turbines were adapted to run on
fossil
fuel.
这些涡轮机被改装成用燃油驱动。
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