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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The Federal Open Market Committee is wrapping up a meeting on interest rates, and many analysts expect interest rates to remain unchanged.

NPR: Seven-Eleven Pulling 'Cocaine' Drink from Shelves

Since 2000, profits have doubled for many blue-chip stocks while their share prices remain unchanged or only up marginally.

FORBES: Investor Illusions

He also points out that, despite the fact that perfume companies come out with new products every year, the ingredients remain largely unchanged and still include many substances identified in Biblical perfume recipes.

ECONOMIST: Cor, you don��t half smell