rap·id /ˈræpəd/
 (a.)迅速的,飛快的,急促的,嶮峻的急流


 rapid
 快速


 Rap·id a.
 1. Very swift or quick; moving with celerity; fast; as, a rapid stream; a rapid flight; a rapid motion.
    Ascend my chariot; guide the rapid wheels.   --Milton.
 2. Advancing with haste or speed; speedy in progression; in quick sequence; as, rapid growth; rapid improvement; rapid recurrence; rapid succession.
 3. Quick in execution; as, a rapid penman.

 ◄ ►


 Rap·id, Rap·ids , n.  The part of a river where the current moves with great swiftness, but without actual waterfall or cascade; sometimes called whitewater; -- usually used in the plural; as, the Lachine rapids in the St. Lawrence.  For boaters on the river, it is a place that can be hazardous, with danger of capsizing or crashing into large rocks.
 Row, brothers, row, the stream runs fast,
 The rapids are near, and the daylight's past.   --Moore.

 ◄ ►


 rapid
      adj 1: done or occurring in a brief period of time; "a rapid rise
             through the ranks"
      2: characterized by speed; moving with or capable of moving
         with high speed; "a rapid movment"; "a speedy car"; "a
         speedy errand boy" [syn: speedy]
      n : a part of a river where the current is very fast