Many species appear to remain unchanged in the fossil record for millions of years—a situation that seems to be at odds with Darwin's model of continuous change.

许多物种似乎在数百万年的化石记录中都保持不变——而这种情况似乎与达尔文的持续变化模型不一致。

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How to construct situation model is the hotspot in comprehension study.

阅读理解中情境模型的建构是当今阅读研究的热点。

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They are definition model, experience model, situation model, emotion model, skill model, performance model, creation model, corporation model and investigating model.

概念模式、体验模式、情境模式、情感模式、技能模式、表演模式、创作模式、探索模式、合作模式等。

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With used-car values already out of whack, shoppers need to be extra cautious to avoid compounding an already unfavorable financial situation by selecting a more problematic model that will require costly out-of-warranty repair work.

MSN: Used-car clunkers to avoid

But the statistical probabilities associated with the screening model that pointed me to MHP, its fundamentals, and the special-situation breakup story, leave me comfortable with MHP.

FORBES: More Than Meets The Eye At McGraw-Hill