The way double polarity s function and LM algorithm combine with BP neural network is analyzed in the paper. The steps of new algorithm were given.

分析了双极性S型函数及LM算法与BP神经网络具体结合实现的方法，并给出了算法步骤。

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Through research a new multifunctional double screw arbor extruder was invented. It could be used as both one-way double screw arbor extruder and two-way double screw arbor extruder.

本文研究开发了一种多功能新型双螺杆挤出机，其特点是既可以作为同向双螺杆挤出机使用，又可作为异向双螺杆挤出机使用。

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If a double-chocolate raspberry truffle puts you in the mood, why let science get in the way?

如果双重山莓松露巧克力能让您的心情愉悦，为什么要让科学成为障碍？

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Milton recognizes that way of thinking as a double standard, ; and he isn't satisfied with this vulgar double standard; so he comes up with a vulgar double standard of his own.

弥尔顿认为这种思维方式有双重标准，他并不满足于低俗的双重标准;,因此他提出了一个他自己的庸俗双重标准。

耶鲁公开课 - 弥尔顿课程节选

What happens during mitosis is that the cell is able to separate this double set of chromosomes into two sets and that happens in a way that's shown in this cartoon here.

当细胞有丝分裂时,细胞将其分开形成两组染色体,如下图所示

耶鲁公开课 - 生物医学工程探索课程节选

This is incredibly important because if you picture having a double bond in a very large molecule, you could have all sorts of other atoms off this way and all sorts of other atoms off this way, and you can picture the shape would be very different if you have one confirmation versus another confirmation.

这是十分重要的,因为如果你想象在一个大分子里有一个双键，你可以在这里有各种各样的其它原子,在这里也有各种各样的其它原子，你可以想象一个构型,和另外一个构型之间的形状差别是非常大的。

麻省理工公开课 - 化学原理课程节选

The only way to double-check the calculations will be to pay an expert to do it.

ECONOMIST: Investors still struggle to understand Europe��s insurers

The only way to double-check the calculations will be to hire an expert.

ECONOMIST: European insurers

"This was the fastest way to double our size, " explains Narendra.

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