"perpetually fresh" is correct and usable in written English.
You can use it to describe something that continually seems new and full of vigor. For example: The landscape of the national park is perpetually fresh, with a seemingly endless number of trails still to be explored.
Ms. Dowd, with eyes that look perpetually fresh from crying, creates an almost oppressive portrait of a loving but smothering woman who both dotes on her sons and drives them away.
Mr. Liebman, the saxophonist who was first heard widely in Miles Davis's electric bands of the early 1970's, is something of a teaching guru and has kept his philosophy of jazz perpetually fresh.
Her guests, who may include an I.B.M. nanotechnology expert, a software developer or a research scientist, settle into cushy blue pillows on lounge chairs, enjoy a table of perpetually fresh sushi and flutes of Champagne emitting bubbling stars while they discuss serious business in chat.
I also recommend Tennyson's narrative poems, such as "The Gardener's Daughter" and "Enoch Arden" – and few poets have written as well in the epistolary form, as in "To Mary Boyle", a poem as perpetually fresh as any in the language, one that reveals this poet's odd, distinctive mode of forthrightness and reserve, his easy mastery of form.
Mulaney is often compared to Jerry Seinfeld, another perpetually fresh-looking and seemingly untroubled performer.
So why allow, many religious people would ask, an impoverished imagination to exclude the very possibility of an over-arching story arc perpetually giving fresh meaning to our individual lives?
Their fantasy, their invention is perpetually new.
The director uses the formal constraints of a single set and a limited cast as an opportunity for dexterous and kinetic camera work, which seems perpetually to discover fresh angles and new perspectives on the same decor.
The Fonte Gaia (Fountain of Joy) was a major civic project to celebrate the bringing of perpetually flowing clear fresh water through a series of long subterranean aqueducts to the central square and to several subsidiary fountains in this hilltop town.
If you believe all you read you'd be forgiven for thinking the world of waste is a rollercoaster of emotions with tensions perpetually running high with fresh outrage around every corner.
Put another way, a third of the Afghan Army perpetually consists of first-year recruits fresh off a 10- to 12-week training course.
