查询词典 necessary

Hospital Official: The quiet aeon is necessary; it's in the best absorption of the accommodating and of the physician.

医院官员：这段安静的时间是必要的这是从病人和医师的利益动身，这是从病人护理的利益动身。

After using aerator for 2 to 3 months, it is necessary to change lubricant and drain oil refuse.

增氧机使用2～3个月后，应更换润滑油，放尽废油，注入新油换油要求和方法，详见图二说明。

The market makes high demands on the function of the aerator, so it is necessary to improve the design method and skill, to make innovation design of the aerator, and to advance the mechanical property, the reliability, the economical performance and the property of use.

同时，市场对曝气机的功能提出了更高的要求，需要改进设计方法和手段，进行曝气机的创新设计，改善现有产品的技术性能、可靠性、经济性以及使用性能，满足生态环境保护的新需要。

It is necessary and rational in the early stage of technological development that aerial photography separates from survey.

这种航空摄影与影像测量分离的现状，在技术发展的初期是必然的，也是合理的。

Therefore, other sources of information for the aerodrome may be necessary for these applications.

因此，其它一些关于机场信息的资源对于这些应用可能是必要的。

With the development of the society desire to Aesculapius, the modern medical must have both scientism and humanism. On the change period from medico to medical, stronger general education is very important to cultivate ethic and ethics, society liability and occupation custom of medical practice students. Meanwhile, in this period the medicine specialty science spirit and innovate idea is being radicated, so it is very necessary to strengthen stronger general education.

随着社会对医学人才要求不断的变化和提高，现代医学人才必须兼具科学精神和人文精神，作为从医学生到医生转变阶段的实习阶段是这两种精神从理论到实践的转化阶段，这一阶段强化通识教育对培养未来医务工作者所需的伦理道德、职业习惯、社会责任感等人文素养的形成具有重要的意义，同时这一时期也是医学生专业科学精神和创新思维的起始阶段，这一时期强化通识教育是十分必要的。

It is necessary to have the content, while aesthetically.

既要有内容，同时又要具有美感。

It is necessary and significant to study the affecting factors of the data quality of corporations.

学者们认识到了数据质量研究的必要性，并取得了丰富的成果。

It is proved that the least squareestimators of linear estimable functions of regression coefficients areadmissible under matrix loss and minimax. The necessary and sufficientexistence conditions are derived for the uniformly minimum riskequivariant estimators of linear estimable functions ofregression coefficients under an affine group and a transitive group oftransformations respectively. It is also proved that there are no UMREestimators ofthe covariance matrix and variance under an affine groupof transformations and quadratic loss functions.

本文证明了回归系数的线性可估函数的最小二乘估计是极小极大的且在矩阵损失函数下是可容许的；还分别在仿射变换群和平移群下导出了存在回归系数的线性可估函数的一致最小风险同变估计的充要条件，并证明了在仿射变换和二次损失下不存在协方差阵和方差的 UMRE 估计。

Necessary conditions and properties of sub affine transformation are given.

对于图像信息，传统的保密学尚缺少足够的研究。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。