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objective to analyze the ct appearance of thyroid carcinoma and the differential diagnosis of various thyroid disease.methods 83 cases of thyroid carcinoma and 119 cases of various benign disease with surgical and pathologically proved were analyzed retrospectively.results the ct findings of 83 cases of thyroid carcinoma include:ill defined nodules boundary (n=62),irregular necrosis(n=59),cystic(n=23),"peninsula" enhancing tubercles around the tumour(n=25),"mastoid" tubercles around the tumour(n=11),calcification(n=55) including large scale(n=27) and local(n=28),trachea invasion(n=15),neck or supraclavicular lymph node metastasis(n=27),the accurate of ct to differentia benignancy from malignancy on thyroid disease was 93.6%(189/202).conclusions "peninsula" enhancing tubercles was the characteristic sing of thyroid carcinoma,"mastoid" enhancing tubercles or large scale calcification was the affirmative sign,the ct signs was vary useful to differentiating thyroid disease.

摘 要］目的：分析甲状腺癌的ct表现及鉴别诊断要点。方法：回顾性分析经手术病理证实的83例甲状腺癌和119例甲状腺良性病变的ct表现，归纳总结不同病变的ct特征。结果：83例甲状腺癌中：边界不清62例，不规则坏死59例，囊性变23例，出现"半岛状"强化结节25例，"乳头状"强化结节11例，钙化55例(其中弥漫性钙化27例、局灶钙化28例)，侵犯气管15例，颈部或锁骨上淋巴结肿大27例，ct对甲状腺病变的良恶性鉴别诊断符合率93.6%(189/202)。结论："半岛状"强化结节是甲状腺癌的特征性表现，"乳头状"强化结节及弥漫性钙化可做为甲状腺癌的肯定性征象，掌握各种甲状腺病变的ct表现特点，对病变的定性诊断及鉴别诊断具有重要意义。

Their actual punishment might well be 'useful' in Benthamite terms because, if we admit such excuses, crime may be committed in the hope that a false plea of mistake, accident, or mental aberration would succeed.

对他们的实际惩罚，用边沁的话来说，或许是十分"有用的"，因为如果我们认可这种免责事由，罪犯就可能会被抱着这样的希望(肯定地，有时确实得以实现了)而实施犯罪，即关于认识错误、意外事件或精神失常的一种虚假的辩解会得逞。

Moreover for derivatives of benzimidazole, density functional theory method calculations of the structure, atomic charge distributions and electronicspectra have been performed at B3LYP/6-311G*~* level. The results of the calculationshave been compared with experimental data and they are found to support each other,which provide useful information for the further study on derivatives ofbenzimidazole.

并运用密度泛函理论在B3LYP／6-311G~**料水平上，对化合物的优化几何、原子电荷分布及转移、电子光谱以及及在不同温度下的热力学性质进行了计算，从而为苯并咪唑类化合物的进一步研究提供了有价值的参考和理论数据。

The synthetic product was identified with mass spectroscopy and IR spectroscopy. The properties of PBZP were dompared with those of two useful photoinitiators, benzoin ethylether and benzophenone.

用质谱与红外光谱对产物作了鉴定，其性能与常用的紫外光敏剂苯偶姻乙醚及二笨甲酮进行了比较。

The paper has offered an important way to explain Bertrand paradox, meanwhile, it has also done an useful attempt to merge the prospect theory of behavioral economics into the modern industrial organization theory and market price theory.

然后，将此模型与不确定性条件下Bertrand完全理性竞争模型（即Bertrand竞争期望理论模型）进行比较。本文在提供又一条解构Bertrand悖论的重要途径的同时，为行为经济学的预期理论融入现代产业组织理论和价格形成理论做出了积极有益的尝试。

The Bestiary has such useful details as actual movement speeds, life-cycle chronology, population density, etc., and was once used by the Dallas Museum of Natural History for an Olympics tie-in exhibit on animal running speed and jumping distances because it was the only single place with those details.

在动物寓言已成为实际的移动速度，生命周期年代，人口密度等，这些有用的详情，以及曾经使用了达拉斯自然史博物馆为配合奥运会的运行速度动物展览和跳跃的距离，因为它是只有一个地方的这些细节。

What will be the effect of this paper I know not: perhaps he will read it and laugh, and light the fire in his furnace; but my hope is that he will quit his trifles, and betake himself to rational and useful diligence.

这篇短文能起到什么作用，我不知道。也许他读了会一笑置之，又去生他的炉子。不过，我希望他不要再忙于琐事，而应理智地，勤勉的做些有用的事。

Certainly it will be very useful to improve spiral bevel and hypoid gears industry in our country.

这对提高我国弧齿锥齿轮和准双曲面齿轮润滑设计与应用水平有重要价值。

Useful metrics beyond precision and recall include: time required to learn the system, time required to achieve goals on benchmark tasks, error rates, and retention of the use of the interface over time

除了检全率和检准率还包括：学习系统所需时间，实现基准任务的目标所需时间，出错率，界面长期使用方式的一致性。

We have, however, collected the considered views of a lot of people and we think that, even given the problems of a biased sample, they give valid information and lead to conclusions that could guide useful research and give a wake-up call to teachers and parents of left-handed children.

不过，我们已收集了审议意见，有很多人，我们认为，即使考虑到的问题有偏见的样本，他们给有效信息，并导致结论可以指导有益的研究，并敲响了警钟教师和家长的左手儿童。

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％。