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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Economist Helena Leurent says this period of rapid change in manufacturing is a fantastic opportunity to make the world a better place.

经济学家海伦娜·洛兰特说，制造业的这一快速变化时期是一个可以让世界变得更美好的绝佳机会。

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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