不可知的

Taking a heavy truck cab as the example, a model of the spotweld space based on finite element was built to analyse the torsional stiffness of the model, and the amount and layout of the spotweld using the discrete variable topology optimization were optimized. Comparing with the original model in welding spot's number and the torsional stiffness, the optimized model has less number of welding spot, but the torsional stiffness of the two model is almost the same.

以某重型卡车驾驶室为例，在有限元模型基础上建立焊点空间模型进行扭转刚度分析，并采用离散变量拓扑优化方法对焊点的数量及空间布局进行优化，通过优化前后的对比可知，优化后在不降低扭转刚度的同时减少了焊点数目。

By analyzing on status quo of railway goods yard fundamental equipment in our country,it can be found that the fundamental equipment in existence can ′t adapt to the need of goods transportation.

由我国铁路货场基础设施的现状分析可知，现有的铁路货场基础设施已经不能适应货物运输的需求。

Books, such as The French Diet: The Secrets of Why French Women Don't Get Fat , by Michel Montignac,...

可知，《法国人的膳食：法国女性拒绝肥胖的秘诀》一书的作者是米歇尔·蒙蒂尼亚克，而不是安东尼娅·特里科保罗。

In order to represent more accurately the heterogeneity of human experience in China, we have to expand our horizon from highly abstract and univocal systems of thought to more localized, oral and non-elite mentalities.

从中国现时在迅速的城市化发展底下仍有超过百份之七十的人口居于农村可知，任何中国文化与宗教的研究都不可能离开其乡土的背景。

Ideas are the only true being,noumenon,inbeing,purpose and mode,which could be known but not be felt.Among these,the idea of good is perceived as "idea of ideas."

在柏拉图看来，理念是唯一的真实存在，是本体、共相、目的和模型，可知而不可感，而其中善的理念则被视为&理念之理念&。

The experiment results show that SP-frames have lower coding efficiency than P-frames and significantly higher coding efficiency than Ⅰ-frames, and provide functionalities that usually unachieved with P-frames, at the same time greatly reduce bit cost.

从实验结果可知，SP帧的编码效率尽管略低于P帧，但却远远高于Ⅰ帧，而且提供的功能P帧是不具有的，同时大大降低了码流开销。

These numbers suggest that the key to career satisfaction is to be in a line of work that inspires and energizes you.

由第一段可知对自己目前的职位不满意是一种普遍的现象，故A错；C项属于对原文第一段中If

Jean Potvin, a physics professor at Saint Louis University and a skydiver who does parachute research for the Army.

可知，Jean Potvin是圣刘易斯大学的物理学教授，但没有说他是不是世界著名的物理学家。

Jean Potvin, a physics professor at Saint LouisUniversity and a skydiver who does parachute research for the Army.

可知，Jean Potvin 是圣刘易斯大学的物理学教授，但没有说他是不是世界著名的物理学家。

On a side note, my sinuses disappeared within 15 minutes after I got off the plane.

就在我下机的前15分钟，我几乎感受不到我的脉搏，如此可知我多么喜爱这国家。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐