查询词典 two or three

Based on the distribution of the genera in the world,the eight distribution types of the genera were divided.In addition,the distribution characters of the Perlidae in China were also probed preliminarily.So far two subfamilies,four tribe and twenty genera have been found in China.Ten of them,of which three genera are endemic to China,are the Oriental genera;one Palaearctic genus;three Oriental-Palaearctic genera;one Oriental-Nearctic genus;four Oriental-Palaearctic-Nearctic genera and one Oriental-Palaearctic-Nearctic-Afrotropical genus.

文中还就中国郋科昆虫的地理分布及特点作了初步的探讨，结果表明：在我国已知的2亚科4族20个属中，东洋区分布的有10个属，其中有3个属仅分布于我国；古北区分布的有1个属；东洋-古北区分布的有3个属；东洋-新北区分布的有1个属；东洋-古北-新北区分布的有4个属；东洋-古北-新北-非洲区分布的有1个属。

Results; Three cases had extensive perinephric edema.Two of the three resulted from adverse current through renal sinus.The another resulted from rupture of lower section ureter.

结果； 3例广泛性肾周积液水肿，其中2例由肾窦逆流造成，1例由输尿管下段破裂造成，其余无明显肾周水肿。

The mechanism of the dehydrogenation reaction of Os〓 with methane The minimum energy reaction path of this reaction is found not to be one of three PESs of a certain spin state, but to involve the crossings between each two adiabatic surfaces of three spin states.

本文主要用UB3LYP方法，结合相对论赝势，系统地研究了气相Os〓及其氧化物阳离子OsO〓（n=1-3）与甲烷的反应以及气相FeO〓与乙烯的反应的机理。

Three mice were killed every time at interval, of one, two, three, four, and six weeks after the implantation, and the tissue where the composite was implanted was excised for histologic investigation of heterotopic steogenesis under photomicroscopy.

结果：大鼠骨髓基质细胞体外培养后增殖，植入后2周（1只）、3周（2只1）、4周（1只）、6周（1只），在石膏和陶瓷人工骨复合移植侧载体周边均见骨生长、骨软骨生长和骨髓生长，各阶段中均见纤维组织增生。

That is to say, in the light of the principles including integra ting resources-environment with socio-economy and combining spatial span with tem poral limitation, etc., the index system designed contains five grades and fifty -two single factors, and the three comprehensive evaluations taken includes sys t em clustering, gray constellation clustering and fuzzy integrate analysis. Three appraisal results validate each other, which are approximately consistent.

自 下而上途径采用综合评价指标体系，即按照资源环境与社会经济相结合和空间跨度与时间跨度相结合原则来设计指标体系(5个层次、52个单项因子)，然后进行系统聚类分析、星座聚类分析和模糊综合分析三种综合评价，各种评价结果相互验证，其结果大体一致。

For three different reaction paths leading to ortho, meta, para-chloropyridine, two transition states have been located by PM3 on each reaction path, while only one transition state by ab initio, however both methods give the same results: the energy of transition state and activation barrier on producing 2-chloropyridine are the lowest among three reaction paths, so 2-chloropyridine is obtained priorly, which agrees with the experimental results.

生成邻、间、对氯代吡啶三条不同反应途径PM3方法优化得到两个过渡态，而从头算方法中只优化得到一个过渡态。但两种方法的研究结果均表明：三条反应途径中生成2-氯吡啶的过渡态能量和活化能最低，因此反应优先生成2-氯吡啶，与实验结果一致。

With the development and application of three-terminal devices, a millimeter-wave three-terminal device oscillator has some advantages over a two-terminal oscillator, for instance, operation frequency band, efficiency, stability and integrity. Especially, for PHEMT (pseudomorphic high electron-mobility transistors) oscillator and HBT (heterojunction biplor transistors) oscillator, there is lower noise and better integrity, operate in wider dynamic range and higher frequency band.

随着三端器件的发展，相对于毫米波二端器件振荡器而言，毫米波三端器件振荡器具有工作频带宽、效率高、工作稳定和集成度好等优点，特别是用PHEMT和HBT器件制作的振荡器，具有更低的噪声，更大的动态范围，更好的集成度，可以工作在更高的频段，所以固态器件毫米波振荡器已逐步向三端器件振荡器发展。

That would suggest that this industry, like many others, will evolve towards three large generalist players and several small niche firms, a phenomenon that Jagdish Sheth and Rajendra Sisodia, two academics, call "the rule of three" in a book of the same title.

那将建议这个工业，像许多其他行业一样，将在三个全面选手以及一些小的专业公司下发展，JB和RS，两位学者在一本有着同样标题的书中&比例法则&中阐述的现象。。

a three steps sequence therapy was designed for patients suffered post dural puncture headache total 45 cases:step one,patient keep supine recumbence,and intravenous injection of ringer's solution 1000ml with intramuscular injection of tramadol 100mg was administrated. if pdph could not relieve within 24hr,the next step should be use. step two,drinking a cup of coffee three times a day for patients who were allowed to eating or intravenous injection ketamine 0.5mg/kg for patient in fasting diet.

选择椎管内麻醉后发生头痛的病例共45例，按设定的序贯疗法分别为a：去枕平卧1d，每天补液量增加1000ml平衡液，肌注曲马多100mg，无效时进入b和c；b：能进食者给予市售咖啡饮品，每天三次；c：不能进食者静脉注射氯胺酮0.5mg/kg，连用2d；以上治疗无效时进入d：行硬膜外填充自体血10ml。

People could see some new features during this period such as images going with events.Part Three probes into the themes and philosophy in Historical Ode. The diversity of poets" ideologies has resulted in complicated themes and intricate philosophy in their works. Generally speaking, themes and philosophy among the poems were expressed in three forms: Chanting in the Wind, that is, the poets give voice to their ambitions and concerns among the words with optimistic attitudes; Bitter of Lofty Ideal Frustrated: poems of this kind usually take up pessimistic themes expressing poets" bitter suffering and their failed ambitions and among these poems signing for the misfortunes of some female has taken a large portion; Detached Stance toward Fame and Wealth: Secluding from the world and seeking political ambitions are two opposing elements in an antimony which have coined the peculiarity of ancient literati.

第三章：咏史诗的主题哲思诗人带着对历史的主观感悟进行咏史诗创作，使咏史诗的主题哲思呈现纷繁复杂的现象，汉魏六朝咏史诗的主题哲思主要有：长啸清风—英雄抱负的乐章：在传统儒学熏陶下形成的历史责任感和积极入世心态往往使文人将其对国家、民族的关怀和对自身建功立业的渴望流露在他们所寄托的文学作品中；世事迪遣—壮志难酬的苦闷：入世受阻后诗人往往从对英雄的追慕转向对不幸人物的同情，悲情主题是咏史诗中较多的一种，表现作者壮志难酬的苦闷和怀才不遇的伤感的形式是多样的，其中又以对不幸女性的吟咏居多，这主要是因为诗人和悲剧女性命运和情感上的类同使然；遗荣守真—无与外物的逸响：遗荣守真的隐逸思想和政治关怀的入世态度作为一组对立面共同构筑古代士人的理想情趣，&仕&与&隐&的抉择冲突作为文人生活中不断上演的主旋律，常常通过咏史诗体现出来。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。