因此，我们有一个正在形成的有花植物的化石记录，包括许多灭绝类群，达尔文会感到高兴的。

As a consequence, we have an emerging fossil record of flowering plants that includes many extinct taxa and would have delighted Darwin.

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然而，在上世纪末对与原始人类化石有关的动植物化石群进行进一步研究后，大草原理论遭到质疑。

Towards the end of the century, however, doubts were raised about the savannah theory, after closer examination of the fossilised flora and fauna linked with early hominid fossils.

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对辽宁西部晚侏罗世义县组中的孢粉植物群进行了系统研究，首次发现了目前为止世界上最古老的被子植物花粉化石。

This paper reports fossil pollen collected recently from the Upper Jurassic Yixian Formation of western Liaoning Province, and first demonstrates the oldest known angiospermous pollen in the world.

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