长春藤大学校长中一半是女性，新闻主播中也将有三分之二由女性担任，最近四任国务卿中出现了三位女性。

Half the Ivy League presidents are women, and two of the three network anchors soon will be; three of the four most recent Secretaries of State have been women.

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因此复活节后那个星期我们骑自行车出发去温普芬，阿莫·巴赫和米尔藤贝格进行为期四天的旅行。

So the week after Easter we set off by bike on a four-day trip to Wimpfen, Amorbach, and Miltenberg.

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作者同样援引对藤壶植物的四卷论述（1851-54），带我们走进了物种起源中心问题的探索；

The four-volume treatise on barnacles (1851-54), is used to investigate the central question of how species originate.

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