It found favour, and in particular it accelerated the completion of a genome-sequencing project for the animals-a sine qua non for any self-respecting model organism.
AFTER China, where next? Over the past two decades, the world's most populous country has become the market qua non of just about every global company seeking growth.
So we say: " Well, I don't know. It has a certain je ne sais qua." Or so you talk about an actress or an actor, or a person, any person, or you talk about a food or a fashion, or an art.