此前，世界上许多科学家都认为地球上的原生命组成成分是由陨石从外太空带到地球来的，而陨石中左型氨基酸的发现进一步证实了这一猜想。
Many experts believe biological raw ingredients were carried to Earth in lumps of asteroid rock.
这不但是一个重大的突破，而且有力证实了增加更多成分就能产生一种更有效产品的可行性。
It's a significant breakthrough and a striking example of the effectiveness of adding more components to create a more active product.
她赞同这些鱼壳证实了早期现代人类能够完成多任务计划，并且对于他们想要制造的成分的质量进行抽象思维。
She agrees the shells are evidence that these early modern humans could "multitask and think in abstract terms about the qualities of the ingredients that they manipulated."
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