phrase/nə s(ə).ʁɛs kə/
in part because, not least because, partially because; if only; at least; even; not even
“Cette année, notre équipe a plus de chances que jamais de remporter la coupe – ne serait-ce que parce que nous nous entraînons très fort.” — This year our team's chances of winning the cup are better than ever before – not least because we train very hard.
Synonyms: ne fût-ce que
Literally, “(it) would not be that, but”.