The phrase "are necessary features of" is correct and usable in written English.
It can be used when describing essential characteristics or components of a subject or concept.
Example: "The ability to communicate effectively and work collaboratively are necessary features of a successful team."
Alternatives: "are essential elements of" or "are vital components of".
Detailed surface temperatures are necessary features for durability studies of the surface coating, hence the effect of coating degradation on USC and system performance.
The activity and organization of mitochondria are necessary features among the diverse events involved in oocyte cytoplasmic maturation [21], and the homogeneous distribution of mitochondria in the cytoplasm is positively correlated with ATP content [22].
An explanation as to why placebo was necessary featured in only 12 (23%) of the sets of participant-information materials, and only six (12%) of the documents discussed the possible risks associated with placebo.
It would be unproductive to ask whether all these are strictly necessary features of criminal law, or whether we might still count a practice that lacked one or more of them as a system of criminal law; the most we can sensibly claim is that these are central features of the paradigm of criminal law as we understand and experience it.
The idea that seemingly irreducibly complex systems cannot evolve has been refuted through evolutionary mechanisms, such as exaptation (the adaptation of organs for entirely new functions) and the use of "scaffolding", which are initially necessary features of a system that later degenerate when they are no longer required.
These, then, are the necessary features of a free society that knows itself by the liberalism of fear: (1) aversion from cruelty, and legal recourse against it; (2) checks by the people, incorporated in government, against the abuse of power by government; (3) open and uncoerced public discussion of public affairs; (4) well-maintained prohibitions against the invasion of privacy.
We accept that the nature of that connection for an individual is analogous to the state of being in other spheres of life that may be the necessary features of physical existence (e.g. water), or of psychological well being (e.g. a loving parent), or of social existence (e.g. relationships).
In addition to permanence, integration into the host's biology is one necessary features of HGT [ 26].
This was somewhat different from the study by McDaniel et al. (2011), in which feedback was provided after the prequestions and the lessons relevant to some of the prequestions occurred during subsequent class meetings (these were necessary design features of the study that aligned with the way in which the course was structured).
