(1) The sebum flows through a narrow follicular canal or duct and empties onto the surface of the skin through a pore or opening.

(2) If the opening of the skin pore is sealed off from air, the result is a whitehead.

(3) After hours poring over the documents I think it entirely justifiable to argue that one man acted as an agent provocateur.

(4) They have pored through studies conducted over 85 years of psychological research.

(5) Drea was poring silently over the books around her.

(6) These were the studies that Nathan pored through , experimenting with different food combinations, monitoring his blood chemistry and keeping detailed records of his findings.

(7) Skin cleansing products help remove dirt and germs from the skin surface and pores .

(8) I remember spending hours in the library poring over orders of the Court.

(9) Why, after a few hours poring through recent news reports I have become deeply afraid of how really gosh darn-dead you're gonna get if you don't drink more.

(10) Despite his age, Greenspan is still said to be enthralled by the statistics over which he has pored for many years.

(11) It is also noteworthy that the cell surfaces are pocked with pores which pass to the interior.

(12) Some years ago, while poring among the items on offer at a stoop sale in Brooklyn, I came across a copy of the thirteenth printing of The Great Crash by John Kenneth Galbraith.

(13) Each bird that appeared was a challenge to name; I studied them thoroughly and pored over my field guides.

(14) Brian and his wife Theresa have spend endless hours poring through this vast accumulation of negatives before eventually settling on the photographs that they would use in the exhibition.

(15) They watched the video on a large screen and spent hours poring over every detail.

(16) She indulged his taste for draughtsmanship - the two pored together for hours over architectural drawings.

(17) Once back home, he'd spend hours in his room poring over those recordings.

(18) In my house, as in many other households, there was a multivolume pictorial history of the war, over which I pored for entire mornings or afternoons, until I knew every picture by heart.

(19) Stomata are minute pores in the surface of leaves through which water vapor and gases, including carbon dioxide, pass.

(20) Mick Wilson suggests a strategy of active reading that means poring over material three times.