Now, when Milankovitch first proposed this theory in the 1920s, many of his colleagues were skeptical.

当米兰科维奇在20世纪20年代首次提出这个理论时，他的许多同事都持怀疑态度。

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First proposed in the late 1800s, the theory relies on a property of water not commonly associated with fluids: its tensile strength.

该理论于19世纪末首次提出，其依据是水的抗拉强度，而水的这种特性通常与流体无关。

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This idea that we've entered a new Anthropocene Epoch was first proposed in 2002.

“我们已经进入了一个新的人类世”这一观点最初是在2002年提出的。

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The legislation was first proposed in two thousand seven by Joe Biden, then a senator, now the vice president.

VOA: special.2009.10.24

Ever since this was first proposed, there has never been any observations that do not coincide with the idea, that did not match the fact that the probability density is equal to the wave function squared.

从未有，任何观测，与它相抵触,从没有过，波函数的平方不等于,概率密度的情况，关于马克思，波恩。

麻省理工公开课 - 化学原理课程节选

Scholars have proposed three possible models to explain the formation of Israel. The first is an immigration model.

学者们提出了三种可能的模型,来解释以色列的形成，第一种是移民模式。

耶鲁公开课 - 旧约导论课程节选

President George W Bush first proposed a defence shield in Europe, which had incensed Russia.

BBC: US to boost nuclear missile defence to counter N Korea

The concept that stem cells run-amok may fuel cancer's spread was first proposed in the 1960s.

FORBES: Cancer Killer

Or so the theory of the Uncanny Valley, first proposed by Japanese roboticist Masihiro Mori, goes.

FORBES: The Steve Jobs Action Figure Walks Into the Uncanny Valley but Will Anyone Buy Him?