Listening practice: The animals that moved before the Cambrian
High School English Listening Practice.
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High School English Listening Practice.
Ediacaran:埃迪卡拉纪,寒武纪之前的地质时期fossil site:化石地点assemblage:生物群;由同一时期、同一环境中的化石组成seafloor:海底sexual reproduction:有性繁殖bilaterian:两侧对称动物,身体有前后、上下和左右之分soft-bodied:软体的;没有骨骼、外壳等坚硬部分evolutionary milestone:演化里程碑deep marine environment:深海环境It means the evidence for movement, reproduction, and body plans now reaches farther into the past.It means。后面的 the evidence ... reaches farther into the past 是宾语从句。这里的 farther into the past 不是说化石向后移动,而是说证据可以把这些演化事件追溯到更早的年代。may、possible 这样的谨慎措辞;软体生物本来就很难保存,深海起源的观点也只是由这处地点提供支持。最稳妥的结论是:这批化石扩大了我们对早期动物能力和生活环境的认识,而不是一次性解决了动物起源之谜。1sciencedaily.com
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