查询词典 be essential to

Water is essential to the growth of crops.

水是农作物生长所必须的。

Water is essential to the growth of crops .

水是庄稼生长所不可缺少的。

Cross ratio is an essential invariant related to projective transformations,and discovering intrinsic properties of scene by using invariance of cross ratio computation is one of the hotspots in computer vision fields.

1引言交比是一个和射影变换有关的一个基本不变量，它的透视不变性已经引起了计算机视觉研究人员的重视，人们利用它从透视图像中进行物体识别[1][2]。

In conclusion, since translation is a kind of cross-cultural communication, a careful study of cultural default is essential to successful translation.

文章最后指出，翻译是一种跨文化交际活动，因此，对文化缺省的充分研究是翻译成功的关键。

It is ESSENTIAL that a piece of screen be used to filter out the crud in the oil.

至关重要的是一块的屏幕采用了在石油污物过滤。

The research result will have an essential effect on the development of cruise missile in our country.

该技术的研究成果将对我国巡航导弹的研制起到重要作用。

Essential Oral English Cruse will be used as the textbook of the oral class.

标准英语口语课程将被作为口语班的教材。

The cooling process involves complex droplet evaporation, strong convective heat and mass transfer, therefore a deep understanding of spray characteristics is essential to optimize the nozzle design and improve the cooling efficiency of the spray. This paper presents a theoretical model to describe the equilibrium evaporation process of a single droplet in cryogen spray.

为了深入了解制冷剂喷雾特性以提高冷却效率、优化喷嘴设计，利用质量传递数法推导传质方程，通过选取合适的阻力系数经验关联式建立了动量方程，考虑液滴蒸发以及与环境气体的对流换热建立了液滴能量方程，初步建立了单个制冷剂液滴平衡蒸发阶段蒸发冷却理论模型。

In this study, the essential oils of Cryptomeria japonica were selected to evaluate its effect of repellent and death against silverfish.

本论文选择柳杉精油为研究对象，针对其可能具有之衣鱼忌避及致死活性进行评估。

Nothing, they maintain, is more essential than such proje cts in the economic growth.

他们认为在经济发展中，没有什么比这些艺术项目更重要了 87。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。