对合点

Chapter 4 presents five design criteria of S-boxes of block ciphers, develops a method of constructing large S-box by use of algebraic group operation, proves the balance property of these large S-box, tests the strict avalanche and independence of avalanche variables properties of S-boxes in NEA cipher, analyses the nonlinearity and best linear approximation of the S-box, and finally defines the differential of input/output of S-boxes of this cipher and analyses the distribution of them.

第二部分即第三章，提出了一种新的分组密码类NEA(NEA-4A，NEA-8A，NEA-4B，NEA-8B)，完整地描述了该密码类的加解密过程和密钥协议；证明了NEA-4B和NEA-8B的完全对合性和没有不动点的性质；分析了该密码类的安全特征；具体地介绍了实现该类密码的途径；给出了NEA-4A的计算机C语言程序和样本数据。

The traditional way of surgical suture with a mature technology, the use of a wide range of easy-to-use features, but there are not enough bonding closely wound skin defects, skin case for All by the surgeon a great influence on technical proficiency, it is most important sewing suture is essentially a "point" joint, with the gap between points is the root cause of scar formation.

传统的手术缝合方式具有技术成熟、运用面广、容易操作的特点，但是也存在创口皮肤接合不够紧密的缺陷，皮肤的对合情况受到手术医生技术熟练程度影响很大，最重要的是针线缝合本质上是&点状&联合，点与点之间的空隙是造成疤痕形成的根本原因。

Judged from the papameters including the relative water content and the wa- ter potential of wilting point.

从正常灌水（田间持水量80％）所测定的萎蔫点相对合水量、萎蔫点水势和总体原初渗透压（ψz0）判断， 4种果树抗旱性的顺序是：杏、桃＞苹果＞葡萄。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。