The phrase "are sufficiently few" is correct and usable in written English.
It can be used to indicate that a certain quantity or number is low enough to meet a specific requirement or condition.
Example: "The options available for this project are sufficiently few, making it easier to choose the best one."
Alternatives: "are adequately few" or "are limited enough".
Although the proposed algorithm sometimes misses a few deadlines, these are sufficiently few to be tolerated in view of the considerable reduction achieved in the scheduling overheads.
The positions recognized by the IEP are sufficiently few and flexible that the algorithm generally identifies multiple rank-ordered target sites in any gene.
Using CS theory, we show that all markers with nonzero coefficients can be identified (selected) using an efficient algorithm, provided that they are sufficiently few in number (sparse) relative to sample size.
If our hominin ancestors tended to live in circumstances where the opportunities for 'wasting' altruism in non-fitness-enhancing ways (e.g., on 'outsiders') were sufficiently few and far between, then a simple, undiscriminating (though limited) sense of concern and altruism may have promoted fitness at far less cost than more discriminating forms, evolving more readily.
After all, if forced separations are sufficiently agonizing, fewer families will try to come here, no matter how dangerous their home countries are.
Furthermore, some promising developments (e.g., public engagement in digitization and high-throughput imaging enabled by conveyor systems) are sufficiently new that few protocols exist.
For instance in case of allergy vaccines, many vaccines (allergens) are being developed of which only very few are sufficiently immunogenic.
Few species are sufficiently well studied to make comprehensive species-specific vulnerability assessments possible.
Intensive training is needed, and relatively few teachers are sufficiently fluent in two languages to be comfortable teaching in both.
Few monks are sufficiently courageous or independent-minded to oppose a message of "protecting Buddhism", however toxic its implications.
Maybe too few people are sufficiently keen on whale bones to want to talk about them, because two curators were kind enough to interrupt their day to meet me.
