The phrase "comprises two phases" is correct and usable in written English.
It is generally used to refer to something that has two distinct components, stages, or parts. For example, "The project comprises two phases: the initial design phase and the implementation phase."
This algorithm comprises two phases, the ad hoc discovery phase and the route establishment and data transmission phase.
Figure 1 shows the flowchart of MDORA, which comprises two phases: ad hoc discovery phase and route establishment and data transmission phase.
This concept comprises two phases: (1) establishing in situ coral nurseries for rearing large numbers of coral fragments; (2) their transplantation onto denuded reefs.
It comprises two phases, namely, product definition using the laddering technique and a novel design knowledge hierarchy (DKH), and product customisation using an integrated methodology of conjoint analysis (CA) and Kohonen association (KA) techniques.
In formalin test, intraplantar injection of formalin comprises two phases of painful sensitivity.
IFN therapy comprises two phases, ie, induction and maintenance, for a total duration of one year.
The plan that was agreed comprises three phases: self-evaluation by plant operators; examination of the findings by national regulators, who then draft a report; then a peer review process by experts and others appointed by the Commission.
The strategy comprises three phases.
The proposed framework comprises three phases: parsing, formalization and evaluation.
The protocol comprises three phases, namely, the reservation phase, helper selection phase, and data packet transmission phase.
The protocol, termed CC ("double C", for clique clustering), comprises three phases, each designed to render the operations of the others swift and efficient.
