The phrase "are some common features" is correct and usable in written English.
It can be used when discussing characteristics or traits that are typically found in a particular subject or category.
Example: "In this report, we will explore what are some common features of successful startups."
Alternatives: "include several typical characteristics" or "represent a few shared traits".
Yet there are some common features.
There is now an emerging consensus about what we need to do next, and there are some common features to the new service models being developed.
There are some common features, but there also are enormous differences.
And, there are some common features and characteristics of OS and BS, which are as follows.
Despite these differences, there are some common features that raters focus on when rating for organization.
Yet, there are some common features identified, including a finite value of the forces at the surface separation d≈0 nm, a maximum ratio between the interaction forces obtained from the MD simulation and Hamaker approach at d≈0.4 nm, a turning point of interaction forces at d≈0.15 nm.
Although there may be some common features to premenstrual, pregnancy and postpartum depressive disorders (e.g. elevated prolactin levels), a specific profile of sleep and biological rhythms distinguishes healthy from depressed women during each reproductive epoch.
Although there may be some common features to menopausal depression compared with other depressive disorders related to the reproductive cycle (e.g. premenstrual dysphoric disorder or postpartum major depression), such as increased morning melatonin secretion, a specific profile of sleep and biological rhythms may distinguish healthy from depressed women during menopause.
Although there are some common structural features of peptidoglycan, there is large variability in the structure of bacterial peptidoglycan due to differences in the amino acid sequence, types of cross-links, and the presence or absence of secondary modifications in both the glycan strands and peptides.
Brain, spinal cord, and retinal injury and disease are heterogeneous, but have some common features: degenerative events leading to cell loss and an inhibitory environment for regeneration.
These criteria vary somewhat between the domains, but there are also some common features (Fig. 3).
