但许多评论家集中讨论起经济二次衰退的可能性，并开始与上世纪大萧条及1937年开始的市场暴跌做对比。

Instead, many commentators jumped on the likelihood of a double-dip recession and started drawing comparisons to the Great Depression and the slump that began in 1937.

youdao

然后，分析对比了振动信号的一般处理方法，包括预处理和二次处理的方法。

Then, analyzes and compares methods of processing vibration signal in used, involves pretreatment methods and secondary treatment methods.

youdao

所有的结果都与参照区段的轨道进行对比，参照区段的轨道自2006年进行初次打磨后就再也没有进行二次打磨。

All results were contrasted with the results from reference track sections which had been left unground after the initial grinding of 2006 to obtain a track section for comparison.

youdao