"good mastery" is a grammatically correct phrase and can be used in written English.
It is typically used to describe someone's level of skill or control over a particular subject or activity. Example: She showed a good mastery of the piano, effortlessly playing complex pieces with precision and emotion.
You have pretty good mastery of it and it gives you this feeling of efficacy.
Coöperation in complex situations would require software with a good mastery of language to communicate with other players, something that doesn't trouble software taking on Go or Starcraft.
Majors are expected to have a good mastery of an East Asian language, and focus on a particular sub-region or a substantive issue involving the region as a whole.
It is based on a good mastery of the definitions and recommendations on this subject.
These problems are usually solved after the learning curve is complete and good mastery of the "mobile window" concept is achieved [8].
With increasing demand for digital arts, illustrators who have a good mastery of both artistic skills and computer techniques will be in demand.
Because if there is no bad, how could good get mastery over the bad?" It is a binary, polarising outlook that recalls the tactics of another strongman leader, president Recep Tayyip Erdogan in Turkey.
In other words, people want to do work that has meaning for them (purpose), and they want to get good at it (mastery) so they can do it in a self-initiated and self-directed way (autonomy).
Coupled with clever dialogue, good acting, and mastery of the camera, the film is absorbing when it is not repulsive.
Similarly, not every question on a test is well-worded or a good indicator of mastery -- which is why I believe that all assessment questions should be released to teachers, students, and parents, so they can evaluate their value.
Lösel, Bliesener, and Köfrel (1998) suggested that other protective factors include hardiness, adaption, adjustment, mastery, good fit between the child and the environment and buffering of the environment by important adults in the child's life" (p. 5).
