This period of extinction wasn't comprehensive.

这一时期的灭绝并不彻底。

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But some animals, after this period of exploration, exhibit behaviors that show they know they are looking at themselves.

但在探索阶段过后，某些动物的行为表明它们知道它们看见的是自己。

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Their advice may be all the more helpful during this period of economic recession.

VOA: special.2009.09.11

Protein was a lot different in this period of time and many health authorities think a higher protein diet would benefit humans.

蛋白质的含量也不同,现代很多健康专家认为,高蛋白质的摄入是对人们有益的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Or my life would've gone better for this period of ten years, but then it would've become worse.

或者说我的生活在这十年本来可以更好，然后它会变得糟糕。

耶鲁公开课 - 死亡课程节选

Schumacher is not the first film-maker to be drawn to this period of recent Irish history.

BBC: Hollywood simplifies Guerin's story

The committee will consider umpires, managers, executives and ball players from this period of baseball history.

FORBES: Cubs Icon Ron Santo Granted Baseball Immortality

In the past, this period of his work has often been dismissed as mere entertainment.

ECONOMIST: Our pick of the best, including music by Abdullah Ibrahim