iff

abbr.

if and only if 当且仅当…时，在而且只有在…时；

n.

当且仅当；

The IFF proof procedure for abductive logic programming
IFF Anti-Doping Education Programme
Official methods of analysis
An improved immunomagnetic procedure for the isolation of highly purified human blood eosinophils
Introduction to pseudoifferential and fourier integral operators
Full copper wiring in a sub-0.25 /spl mu/m CMOS ULSI technology
Official Method of Analysis of AOAC International
The Mechanism of the Reaction of Silver Nitrite with Alkyl Halides. The Contrasting Reactions of Silver and Alkali Metal Salts with ...
POWIFF- Prospective study of wrist internal fixation of fracture: A protocol for a single centre, superiority, randomised controlled...
On a Class of Function Spaces and Related Pseudo〥ifferential Operators