Then, in the Middle Ages, engineers discovered that such supports would last even longer if their downstream side was also shaped to offer little resistance to the current.
然后，在中世纪，工程师发现这些桥墩在下游这一侧如果也建成对水阻力比较小的形状，桥墩寿命还要延长。
In the Middle Ages, the monarch's rule was supreme. If advice or support were needed, the King would summon his richest and most powerful subjects to his Council.
在中世纪，君主命令至高无上。如需进言或支持，他会宣召臣下巨富或显要朝议。
If the world has not come to its end, it has approached a major turn in history, equal in importance to the turn from the Middle Ages to the Renaissance.
假如这个世界还未到尽头，那它就已经到达了一个历史的大转折点，这个转折点的重要性相当于中世纪到文艺复兴的转折。
If I go to the Philadelphia Museum of Art, for instance, in the Middle Ages section, their only truly interesting paintings are the ones by van Eyck and Rogier van der Weyden.
如果我去费城艺术博物馆，例如，在中世纪节，他们唯一的真正有趣的画是凡艾克和罗吉尔范德华的那些。
If I go to the Philadelphia Museum of Art, for instance, in the Middle Ages section, their only truly interesting paintings are the ones by van Eyck and Rogier van der Weyden.
如果我去费城艺术博物馆，例如，在中世纪节，他们唯一的真正有趣的画是凡艾克和罗吉尔范德华的那些。
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