A research team at Harvard analyzed the secret message, and, according to Lafferty's summary of its findings, it had never seen "sixteenth-century ink act as it does on that particular document."

哈佛大学研究小组分析了秘密信息。根据拉弗蒂的调查结果摘要显示，没有哪个16世纪的墨水和“那个字条上的”一样。

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The combination of organic chemistry and mineral chemistry, as well as the combination of non - fixed form material and colloid material chemistry are the secret formula in this century.

有机化学和矿物化学的结合，以及无定形材料化学和胶体材料化学的结合，是这一世纪混凝土成功的秘诀。

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Over a century ago in his play "a Doll's House," Henrik Ibsen used the device of a wife's secret loan to unveil the dynamics of an unhealthy marriage.

一百多年前在“玩偶之家”这部戏中，易卜生导演的不健康的婚姻说道就是一位妻子的秘密贷款被揭露的情节。

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What was the secret to the outsized growth of the 19th century, particularly its latter portion, the Gilded Age?

FORBES: Back on the Road to Serfdom? History Says We Should Be Booming

It is an open secret that hospitals in the 21st Century are full of patients that should not be there.

BBC: Are the patients the problem?

Start your river-led adventure at the city's best kept secret, the turbe, or tomb, of Gul Baba, a 16th Century dervish and the northernmost place of pilgrimage for devout Moslems.

BBC: A Danube-led tour of Budapest