So successful were these theories in accounting for a wide range of chemical properties of the elements that the monatomic-gas electron configurations came to be thought of as chemically inviolate.

这些理论如此成功地解释了元素很广泛的化学性质，以致于，人们逐渐认为：在化学上，“单原子气体电子构型”不可违背。

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He said, "Flexibility is necessary. Stiffness and stubbornness are dangerous and incapable of fitting change." in my opinion, these concepts and theories verily are the most precious thought.

他说：“弹性是重要的。僵硬，顽固是危险而不能适应变局的。”依我看来这些观念、理论实在是最珍贵的思想。

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Some economists also express doubts as to the applicability of Modern Portfolio Theories. Consider this comment by a thought leader in MPT, William sharpe.

一些经济学家还对现代投资组合理论的适用性表示怀疑。

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Dr Alessandro Lugli, who carried out the study which appeared in the American Review of Human Pathology, told the BBC News website he thought theories about alternative explanations for Napoleon's death would continue to be put forward.

BBC: RELATED BBC SITES

These and other thought-provoking theories make this slim volume by a history professor at the University of Genoa more than just another collection of past culinary oddities.

ECONOMIST: Books-in-brief

But that happened, and then there were a series of apologies and theories about how to fix it, but mainly, there was the thought that the people who sell these sun rooms, like the one they sold to us, are going to sell like 10 jillion more of just bragging that elevators can fall from the sky and it still won't break.

NPR: Video Raises Questions About Bhutto Killing