The influence of the pretreating methods was analysed on the dispersion of nylon and PET short fibres in the compound, the length retension of short fibres, power input of mixing, and physical properties and swelling of the compound.

So the injection rate should be controlled in accordance with geologic features in order to reduce the influence of the factors of shear, retension and so on on the viscosity of polymer solution and attain the goal of improving oil recovery.

因此，应根据各区块地质特点适当控制注入速度，以减少由于剪切、滞留等因素对聚合物粘度造成的影响，达到提高原油采收率的目的。

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B accepted traditional group Result: Effective ratio is 98% in group A, 52% in group B in prevention from urine retension Conclusion: Heating massage on bladder area show a good method to prevent urine retension

结果：治疗尿潴留的有效率甲组为98%，乙组为52%。结论：对术后引起的尿潴留采用热按摩法治疗效果明显

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These parameters are fluid flow rate, air ratio, bubble size, retension time, ink recovery rate, flotation rate constant, flotation column dispersion index and the change of bubble surface area.

这些参数有：流体（如空气泡、浆液和浮渣液等）流速、空气比率、气泡大小、滞留时间、油墨回收率（脱墨效率）、浮选速率常数、浮选柱分散指数和气泡表面面积变动等。

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The maximum tensile strength retension and elongation ultimate retension of EPDM vulcanizate after aging were obtained by adding 0.5 phr of TMPTA;

当TMPTA用量为0.5份时，EPDM硫化胶的拉伸强度保持率和扯断伸长率保持率达到最大值；

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From the paper, we can get a conclusion, the bad retension and stability of complete dentures is a familiar phenomenon in the clinic, it is influence by various factors.

从中我们可以得出结论，全口义齿的固位和稳定不良是临床上的一种常见现象，受多种因素的影响。

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The incidence of retension of secretions was about 12%.

其次为分泌物潴留，约为12%。

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To compare the effects of high retension enema with western and herbal medicine in treating postoperative patients following general peritonitis.

目的：比较中药高位保留灌肠配合西医治疗急性弥漫性腹膜炎与单纯西医治疗疗效的差异。

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Cytokine-inducing substance retension by a new polyethersulfone membrane dual layer dialyzer

不对称双层聚乙醚硫胺膜透析器对透析液中细胞因子诱导物质的屏障作用

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Urinary retension was found in 17 patients ( 40.5%), who needed catheterization.

17例（40.5%）有尿潴留，需要导尿。

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Conclusion: Compared with western medicine the effect of herbal high retension enema was favorable.

结论：中药高位保留灌肠配合西医治疗急性弥漫性腹膜炎疗效较好。

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Porterfield : Does writing come naturally for you, or do you have to work at it?

Porterfield:你认为自己有写作天赋吗, 还是要靠自身努力?

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Why don't you lay that problem aside for a while and work at it later?

你为什么不先把问题放在一边过会儿再说?

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Whatever you to do, you should commit to and really work at it.

不管决定做什么, 我都必须投入,真正去做.

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You will never become good at tennis, unless you work at it earnestly.

除非你努力下功夫,否则你将永远打不好网球.

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Choose a cause bigger than you are and work at it in a spirit of excellence.

因此,要选择一项比你自身更大的事业,以非凡的精神为它二.作.

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Most people want to improve themselves, but no too many are willing to work at it.

大多数人要改造自己, 但不多的人愿意下功夫.

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You can't accomplish your goal of mastering the language unless you work at it for years.

除非你学上几年,否则你不可能实现掌握汉语的目标.

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There is no easy way round the difficulty; we shall have to work at it.

这个难题很难回避, 我们只得研究并解决它.

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Sure, you'll have to work at it.

当然, 你得不断工作.

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Sam Altman, president of the tech incubator Y Combinator, recently proposed to fund research into U.B.I. The firm has received thousands of applications for research funding, Mr. Altman said;

孵化技术创业公司的Y Combinator公司总裁萨姆·奥尔特曼（Sam Altman）最近打算给针对UBI的研究提供一些资助。奥尔特曼表示，公司已经收到数千份研究资金申请；

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