I had nine blissful hours of sleep. 我无忧无虑地酣睡了九个小时。
blissful
[ adj ] completely happy and contented <adj.all> blissful young loversin blissful ignorance
Blissful \Bliss"ful\, a. Full of, characterized by, or causing, joy and felicity; happy in the highest degree. ``Blissful solitude.'' --Milton. -- {Bliss"ful*ly}, adv. -- {Bliss"ful*ness}, n.
There is one blissful moment in the second act when Aunt May and Aldo discuss his fear of women.
So he went there one day after a restless night and slept four blissful hours.
The slightest wisp of melody sang; the briefest motif asserted itself. The late C Major Fantasy of Schubert opened with playing at the other extreme, a blissful calm, devoid of tension, long phrases floating on a soft breeze of tenderness.