Although the fossil record is incomplete, it still gives us a broad brush outline of what happened . 尽管化石记录不很完全,但仍然给我们一幅关于到底发生了什么事情的大体轮廓。
That specimen consists of a skull and the fossil impression of the brain of a 6-year-old child who died perhaps 2 million years ago . 这个标本是一个大约死于200万年前的6岁儿童的头骨和脑模化石。
If the first possibility is true, then the fossils were lifted to their present altitudes later by the plateau's upward thrust . 如果第一种可能性是确实的,那么化石是后来由于高原向上隆起才抬升到现在的高度。
But those fossils and robison's interpretations of them formed the initial groundwork for tracing early human evolution in africa . 但是这些化石以及罗宾逊对它们所作的解释奠定了在非洲追溯早期人类进化的初步基础。
Most of the energy sources used in our current technology are the fossil fuels that have been stored in the earth's crust for many centuries . 当代技术领域所使用的大部分能源是已经贮存在地壳内许多世纪的矿物燃料。
Thus any rock found bearing these index fossils can be dated fairly accurately as belonging to their proper period in history . 因此凡是发现含有这类标准化石的岩石就可以相当精确地断定它们在地质史上属于某个相应时代。
The little marine animal neopilina, which was dredged up from the bottom of the pacific in 1952, looks practically identical to its ancestors presented as fossils over 50 million years ago . 1952年在太平洋底挖出来的小形海洋动物,新帽贝,看上去简直同保存了五亿多年的化石祖先一样。
Cambrian era fossils of complex, hard-bodied animals 寒武纪出现复杂的硬体动物
fossil fuel plant feedwater control system-drum type 火电厂给水控制系统.滚筒式
fossil fuel power plant human-machine interface alarms 火力发电厂人-机接触报警