n. 单斜顶棚
[
] Pentode
简写

pent
[ adj ]
closely confined
<adj.all> 
Pen \Pen\, v. t. [imp. & p. p. {Penned}or {Pent} (?); p. pr. &
vb. n. {Penning}.] [OE. pennen, AS. pennan in on-pennan to
unfasten, prob. from the same source as pin, and orig.
meaning, to fasten with a peg.See {Pin}, n. & v.]
To shut up, as in a pen or cage; to confine in a small
inclosure or narrow space; to coop up, or shut in; to
inclose. ``Away with her, and pen her up.'' --Shak.
Watching where shepherds pen their flocks at eve.
--Milton.
Pent \Pent\, p. p. or a. [From {Pen}, v. t.]
Penned or shut up; confined; -- often with up.
Here in the body pent. --J.
Montgomery.
No pent-up Utica contracts your powers. --J. M.
Sewall.