必须的

It is a rather sad statement for the future of science that such a discl aimer is necessary nowadays.

目前这样的放弃声明是必须的，这对于科学的未来是一种相当悲惨的境地。

Most of the orofacial infections are odontogenic. Appropriate antibiotic treatment is one of the important managements. The aim of this study is to obtain information about the bacteriologic features and antimicrobial susceptibility in odontogenic infection. 284 patients with odontogenic infection were reviewed.

颜面部感染大多是齿源性感染，治疗上除病源齿治疗及手术引流外，适当的抗生素治疗也是必须的，本研究即在了解於本科就医之齿源性感染患者其细菌学及抗生素敏感性试验的结果，以作为经验性抗生素选择的参考。

The central technique is preferred because a capsulectomy is not required; however, because this technique is performed under traction, the tissue is under tension and the degree of plication is limited.

因为关节囊切开不是必须的，故在中心技术是优先的；然而在牵引下操作这项技术，局部的组织在紧张状态下关节囊切开的程度受到限制。

The results show that the distribution of instantaneous LST was in general accord with macroscopical variation of coinstantaneous air temperature data,and the diverse topography and different cover types of underlying surface decided spatial distribution patterns of LST.

它将地—气间的相互作用及其间的能量交换结合起来，在气候、水文、生态学和生物地球化学等许多领域的研究中都是必须的[1-4]。

Research of microenvironment werefocused on the neurotrophic factors. Many studies have been done to use nerve conduits filled with exogenetic NTFs with the intention of promote axonal regeneration to the greatest extent efficiently. However concentration of exogenetic NTFs and the means of releasing NTFs still need to be studied.

对于后者，研究主要集中在神经营养因子(neurotrophic factors，NTFs)，众多学者尝试将外源性NTFs引入神经导管，以期尽可能有效地促进轴突再生，但外源性NTFs导入的浓度和释放的途径仍需进一步研究，同时最有益于神经再生所必须的营养因子的数量和种类也待进一步明确。

Therefore it is required for a wide variety of climate, hydrologic, ecological and biogeochemical studies.

它将地-气间的相互作用及其间的能量交换结合起来，在气候、水文、生态学和生物地球化学等许多领域的研究中都是必须的。

Measurements have been made in order to get the correlation between their leaf lenth×width and length+width, and the actual Surface of the leaves, It is well-known that the living leaf surface measurements are essential in production and scientifi...

众所周知，活体叶面积的测算是生产和科研所必须的，相关法是通常应用的有效方法，我们将系数法应用于某些蔬菜活体叶面积的测算，结果表明系数法比相关法更简捷、方便、结果可靠

Regular diet, in addition to containing a large number of animals necessary nutrients, but also contains a certain amount of anti-nutritional factors, these anti-nutritional factors is difficult to digest in the use of sheet monogastric animals, so that intestinal contents became viscous, and wrapped a large number of nutrients, affect the digestion and absorption of nutrients, resulting in animals indigestion, lax and poor growth.

常规日粮中，除含有大量动物必须的营养物质外，还含有一定量的抗营养因子，这些抗营养因子难被单胃动物消化利用，使肠内容物变得粘稠，而且包裹大量的营养物质，影响营养物质的消化吸收，造成动物消化不良，排粘粪，发育不良等。

Cub-carrying also occurs among some other myrmecophagous mammals; therefore one explanation is that cub-carrying is necessitated by myrmecophagy since myrmecophagy entails a low metabolic rate and high energy expenditure in walking between food patches.

幼崽携带行为在其他食昆虫的哺乳动物中也存在；因此，一个解释是幼崽携带行为是食昆虫类哺乳动物所必须的，因为食昆虫类哺乳动物通常新陈代谢率很低而在不同的食物地之间穿行的消耗很高。

It may be necessary to palpate the lesion for firmness and fluctuation; rubbing will elucidate the nature of scales; scraping will reveal the nature of the lesion's base.

触诊法检查皮损的坚实度和波动感是必须的，摩擦可阐明鳞屑的性质，刮法可显露皮损基底的情况。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。