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The Bingham fluid model only can explain the break-loose phenomenon, but is difficult to explain the other phenomena.

Bingham流体模型只能解释试验中观察到的轴颈"松动"现象，但不能解释其它现象。

With the increase in pesticide wastewater of compounds that are difficult to biodegrade, conventional biochemical treatment methods cannot completely remove contaminants from wastewater.

随着农药废水中难生物降解化合物的增加，常规的生化处理方法无法完全去除水中的污染物。

To see how difficult it can be even for Mr Icahn to get his way, look to the saga at Biogen Idec, another American biotech firm in which the gadfly billionaire owns a stake.

要想知道Icahn先生实现自己的想法究竟有多难，不妨参考一下美国另一家生物技术公司Biogen Idec的传奇，该公司也有一个烦人的亿万富翁持股。

To see how difficult it can be even for Mr Icahn to get his way, look to the s aga at Biogen Idec, another American biotech firm in which the gadfly billiona ire owns a stake.

要想知道Icahn先生实现自己的想法究竟有多难，不妨参考一下美国另一家生物技术公司B iogen Idec的传奇，该公司也有一个烦人的亿万富翁持股。

This unlikely trio--a writer, a founding father of molecular biogeochemistry, and a leading petroleum organic geochemist--have created a work that is as difficult to characterize as it is fun to read.

主要作者是Susan Gaines，充满了对化石分子的热情和广泛的知识，Geoffrey Eglinton和Juegen Rullkoetter是其他的两个主要作者，被认为是分子生物地球化学的奠基者，并且领导了石油有机地球化学的发展并且使得所有的这些科学变成了浅显易懂的趣事。

In another word, the most difficult issue in biographic research would be how to avoid subsumption and how to grasp the real concepts of another person or culture in understanding strange biographic narrations.

易言之，传记研究学上最为困难的方**问题就在於：在理解陌生人的传记叙说上，如何避免范括，而能确实掌握理解他人或他文化的真正思想？

Detection of unknown compound from the collected biological sample has long been the difficult part of poison analysis.

从生物样品中检测未知物，一直以来是毒物分析中的一个难点。

In the same time, it is difficult to find some papers in respect of sports biomechanics methods.

同时，运用生物力学研究方法在此领域的研究更是微乎其微。

As we know, it is very difficult to make an exact correlation between the marine and terrestrial biota.

我们面临的一个很大困难在于如何才能保证海相与陆相生物群之间的精确对比。

Bipedalism might feel natural to us, but in fact it's a specialized adaptation that is rather difficult compared to walking on all fours - no wonder most apes and monkeys avoid it. It also explains our prevalent lower back pain.

对我们来说，我们可能感觉两足动物很自然，但是，事实上，两足行走比四足行走难多了，所以，大多数猩猩和猴子避免两足行走也不足为奇，这还解释了我们经常腰疼的原因。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。