The phrase "primary achievements" is correct and usable in written English.
You can use it when you want to refer to great accomplishments, either of your own or of someone else you are talking about. For example, "My primary achievements this year included finishing my degree and landing the job of my dreams."
One of JCAP's primary achievements has been solar-energy-driven devices that can split water into hydrogen and oxygen an important first step on the road to artificial photosynthesis.
Aside from his primary achievements as a novelist and short story writer, he had merit as a poet (unfashionably formalist and always readable), art critic (where his eye-opening descriptive powers put the professionals to shame), memoirist, and literary critic (more than a million words of book reviews for The New Yorker).
The primary achievements after the closing of the Uruguay Round were opening up sectors where advanced economies see themselves as net exporters: telecommunications, financial services and information technology.
In order to increase the links between physics and biology and among the various fields of biological physics, authors are advised to include a first section that introduces the basic issues addressed and the primary achievements to a non-specialist reader.
The three primary achievements of this stage are: sucking, visual tracking, and hand closure.
He considers one of the primary achievements of Occupy to have been to bring together communities to discuss and debate in a democratic forum, thereby rejecting the ideologies of selfishness proposed by the likes of Ayn Rand.
Perhaps the primary achievement of Al Qaeda is to make terrorism portable.
It emerges immediately that the surrealist object fascinated even artists whose primary achievement was of quite another kind.
This kind of thing, I believe, is Bausch's primary achievement, and the justification for the term that was given to her work: "dance-theatre".
Edelman's primary achievement is to place Simpson's dysfunctional life firmly in the context of the last half-century of febrile US racial politics.
The Newark police say that crime in 2009 was down 21 percent from 2006, and the decline is often cited as Mr. Booker's primary achievement.
