The phrase "are usually derived from" is correct and usable in written English.
It can be used when discussing the origin or source of something, indicating that it typically comes from a particular place or context.
Example: "The principles of modern physics are usually derived from classical mechanics and experimental observations."
Alternatives: "are typically sourced from" or "often originate from".
Cytokinin, any of a number of plant growth substances that are usually derived from adenine.
Element material properties in such models are usually derived from bone density values using some empirical relationships.
Such linear models are usually derived from the traditional bottom up approach applied to the analysis of nanostructure properties.
Global heat parameters for the packed bed, such as λeff and αw, are usually derived from homogeneous models.
However, rather than being exactly the tokens that appear in the document, they are usually derived from them by various normalization processes which are discussed in Section 2.2.3.
Pheromones, for example, are usually derived from compounds that are natural breakdown products of body metabolism, such as the compounds in urine.
Associations with postmenopausal hormone therapy are usually derived from unopposed estrogen use, rather than for the combination of estrogen with progestin, but these findings vary by study design.
From the probabilistic point of view, properties of queues are usually derived from the properties of stochastic processes associated with them.
The cells are usually derived from four- or five-day-old embryos that would otherwise be discarded from in vitro fertilization clinics (although sometimes embryos have been created expressly for research purposes).
Sūrah names are usually derived from some conspicuous word in the respective text, such as "The Cow" (the second) or "The Poets" (the 26th), though they do not necessarily identify a text's main theme.
Primary hNPCs are usually derived from fetal CNS tissue at approximately 5 22 weeks of gestation and are expanded as cell clusters in the presence of mitogenic cytokines25,26,27,28,29.
