rif·fle /ˈrɪfəl/
 淺灘,急流,漣漪,把紙牌分成兩半(vt.)使起漣漪,迅速翻閱,洗牌(vi.)流過淺灘


 Rif·fle n.
 1. Mining A trough or sluice having cleats, grooves, or steps across the bottom for holding quicksilver and catching particles of gold when auriferous earth is washed; also, one of the cleats, grooves, or steps in such a trough. Also called ripple.
 2. A ripple in a stream or current of water; also, a place where the water ripples, as on a shallow rapid. [Local, U. S.]
    The bass have left the cool depth beside the rock and are on the riffle or just below it.    --James A. Henshall.

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 riffle
      n 1: a small wave on the surface of a liquid [syn: ripple, rippling,
            wavelet]
      2: shuffling by splitting the pack and interweaving the two
         halves at their corners
      v 1: twitch or flutter; "the paper flicked" [syn: flick, ruffle]
      2: look through a book or other written material; "He thumbed
         through the report"; "She leafed through the volume" [syn:
          flick, flip, thumb, leaf, riff]
      3: stir up (water) so as to form ripples [syn: ripple, ruffle,
          cockle, undulate]
      4: shuffle (playing cards) by separating the deck into two
         parts and riffling with the thumbs so the cards intermix