Concerning the skeleton and muscles of infants embryo, which previously of problem, had been dispute till 20 centuries from 19 centuries;

关于婴儿胚胎的骨骼与肌肉﹐哪个在先的问题﹐从19世纪一直争论到20世纪。

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Either the previously accepted measures upon which hundreds of calculations have been based are wrong, or there is a problem with the theory of quantum electrodynamics itself.

无论是以前成百上千的计算的基础是错误的，亦或是量子电动力学理论本身的问题。

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However, to think upon the problem we must use the felt meanings--we must think of how "this" (which we previously verbalized) relates to "that" (which we also previously verbalized).

但是，当考虑问题时，我们必须使用感觉意义--我们必须考虑“这个”如何（我们之前说出的）涉及到“那个” （我们之前也说出了）。

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Earlier this year, the vast market for commercial paper suddenly dried up, but this was not an insurmountable problem for highly rated companies, which could draw down lines of credit, previously arranged with banks, or tap the market for long-term corporate bonds.

ECONOMIST: Signs of a crunch in America's markets for credit