n.
a writing implement with a point from which ink flows
an enclosure for confining livestock
a portable enclosure in which babies may be left to play
同义词：playpen
a correctional institution for those convicted of major crimes
同义词：penitentiary
female swan
No Pens Playoff Tickets Left
Recent Panic over Pens out of Control
Inadequate suspension of neutral protamine Hagendorn (NPH) insulin in pens.
De l'art de persuader dans les "Pensées"de Pascal
Playoff Pressure? Burden Rests on Senators, Not Pens
Method and apparatus for printing using staggered pens
Of principles and pens: attitudes and practices of medicine housestaff toward pharmaceutical industry promotions.
L'astrologie dans la pensée théologique et philosophique à l'âge classique de l'islam
The Great American Biotic Interchange: Dispersals, Tectonics, Climate, Sea Level and Holding Pens
Pens' Rust Returns in Fine Form; as the Recipient of the Biggest, Arguably Most Memorable Hit of the Eastern Conference Final's Firs...
