查询词典 iff

When the consistency is checked, the "distance diagram"is employed. It is concluded that the axioms of a description satisfies the consistency iff there are no negative directed cycles in the distance diagram.

在验证ISITL描述的一致性时采用"距离矢量图"，并认为一个ISITL描述满足一致性当且仅当其距离矢量图上不存在负矢量和的有向回路。

Tu is a digraph denoted as DHG with nodes corresponding to the data segments of P and a set of directed arcs joining these nodes such that ,for i≠j,Di→Dj Iff there exist tTu s.t.

Dn.A数据库的P wrtTu层次图划分为华赋性与节点对应的数据段P和直接参与了这些节点的弧集，这样，因为我≠，邸→当且仅当存在tεTus.t。

In this thesis, we consider positive solutions of a degenerate parabolic system with homogeneous Dirichlet boundary condition. It is proved that all positive solutions exist globally iff 12≥abλ, whereλ1 is the first eigenvalue of ??

该论文研究一类具有齐次Dirichlet边界条件的退化抛物方程组正解的性质，证明了所有正解整体存在的充要条件是12≥abλ，其中λ1是具有齐次Dirichlet边界条件的？？

In 1986,in the paper [1] Junnila proved the result :A space is hereditarily metacompact iff its every scattered partion has a point finite open expansion .

Junnila在文[1]中证明了：一个空间是遗传亚紧的当且仅当它的每个散射分解有一个点有限的开膨胀。

The Russian designers have a well-deserved reputation for being less technologically sophisticated than their western counterparts, but you can see that the Flogger has a heads-up display, and it also has fairly fancy missile and IFF (identification - friend or foe) systems.

俄罗斯设计师们并不比他们的西方竞争对手有更尖端的技术，却享有当之无愧的声誉，在他们的飞机上你仍然能看到平显，同样拥有空空导弹和敌我识别系统。

Berta Maranz; Head of Piano Department at the Music School for Children and Young People, Gorki; Co-repetitor in Conducting and Lecturer at the University of Gorki; Years of Cooperation with the Centre for Children and Young People; 2002 PhD ;1995 - move to Germany, Lecturer at the University of Music and Drama, Hannover (IFF - Institute for the Advancement of Young Musicians) with national and international Price winners: Elisabeth Brauss, Alexander Haupt, Sun Meng, Igor Levit.

高尔基（现名Nizni Novgorod）青年与儿童音乐学校钢琴系主任；高尔基大学担任副指挥和讲师；与青年及儿童中心合作多年；2002年获得博士学位

Compared with traditional analog IF method and digital base-band method, this new method has some advantages such as simplicity, temperature insensitiveness and high reliability and can be used in spread-spectrum communication, pulse compression radar and IFF systems.

与传统采用的SAW中频模拟处理方法和数字基带处理方法相比，该方法具有结构简单、工作温度范围宽和可靠性高等优点，可用于扩频通信、脉冲压缩雷达和敌我识别等系统。

He TSB 2500 IFF Combined Interrogator Transponder is one of the most advanced systems compliant with the latest NATO and International Civil Aviation Organization standards and regulations.

SB 2500敌我识别询问应答器是世界上最先进的系统，兼容于北约和国际民用航空组织的最新标准规范。

The effect of this matcher with DNA is very strong;the effective mode could be partial insertion effect.

笔者在此报道自合成的Sch iff碱配合物与DNA相互作用的电化学研究结果。1材料与方法1·1试剂与仪器CH1650电化学分析仪上

Autopilot tailored to deck operations and hover, twin-gyro platform and Doppler, duplicated HF, VHF, UHF, night lighting plus strobe, radio compass, radar altimeter, IFF and four passive RWRs.

自动驾驶仪适合甲板作业和悬停，双陀螺平台和多普勒，重复高频，甚高频，超高频，加上夜间灯光频闪，无线电罗盘，雷达高度表，森林论坛和4个被动

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷