'gain a comprehensive' is not a correct and usable phrase in written English.
'Gain' is used to mean to acquire, obtain, or secure something. To make the phrase correct, you would need to modify it to 'obtain a comprehensive'. An example sentence could be: "We need to obtain a comprehensive understanding of the problem before we can formulate a solution."
To oversee its confusing mass of infrastructure, Yarra Valley relied on a collection of different, aging computer systems that made it difficult to gain a comprehensive view of its operations.
He went on, "Most prospective employers do not have the time or resources to gain a comprehensive understanding of who Doe is, and then to figure out what weight, if any, her conviction should play in the hiring process.
Computational methods were also employed to gain a comprehensive understanding of this relationship.
The diversity of subproject aims provided the possibility to gain a comprehensive overview of current biogas practice.
New results on substorm onsets with ASIs should be compared with past results with GIs to gain a comprehensive understanding.
In this study, the Teflon loadings were chosen to gain a comprehensive understanding of the thermal resistance due to Teflon.
We used both abundance-weighted and unweighted dispersal traits in order to gain a comprehensive picture of successional developments.
What's needed now, he says, are methods for integrating these different datasets to gain a comprehensive, quantitative, and reproducible view of the cell.
Identifying the different policy actors and examining their interactions are necessary in order to gain a comprehensive understanding of the local policy-making process in China.
This paper aims firstly to gain a comprehensive overview of Japan's national-level transport planning schemes as well as overarching long-term plans closely related to them.
The embedded relationship between family members promoted the rapid sharing of industry expertise and market information, helping H to gain a comprehensive grasp of manufacturing technology of products.
