The four-toed Eohippus preceded the three-toed Miohippus, for example, but North American fossil evidence suggests a jerky, uneven transition between the two.

例如，四趾的始祖鸟先于三趾的始祖鸟出现，但北美的化石证据表明，这两种动物之间有一个急促而不均衡的转换过程。

youdao

During week 16, three different phases (Elaboration, Construction, and Transition) were underway simultaneously across three evolutions.

在第16周的过程中，三个不同的阶段(精化、构建，和产品化)在三个演进中同时进行。

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In 2007, NASA scientists joined Russian scientists to travel down the river by boat for three weeks to study the transition and how these types of ecosystems may be affected by climate change.

在2007年，NASA的科学家联合俄罗斯科学家乘船考察了这条河的变迁(为时三周)，以及这种类型的生态系统可能如何被气候变化所影响。

youdao

Three of them are in charge of the transition now in Egypt -- Suleiman, Shafik and Tantawi are military men.

WHITEHOUSE: Press Briefing

Key to this work has been the development of a core 3-day curriculum, career readiness standards, three optional tracks for transition (Higher Education, Technical Training, and Entrepreneurship), as well as options for learning in brick-and-mortar classrooms and online.

WHITEHOUSE: Coming Home: Pathways to Success for Service Members and Veterans | The White House