heart-beat
 心搏


 heartbeat
      n 1: the rhythmic contraction and expansion of the arteries with
           each beat of the heart; "he could feel the beat of her
           heart" [syn: pulse, pulsation, beat]
      2: a very short time (as the time it takes the eye blink or the
         heart to beat); "if I had the chance I'd do it in a flash"
         [syn: blink of an eye, flash, instant, jiffy, {split
         second, trice, twinkling, wink, New York minute]
      3: an animating or vital unifying force; "New York is the
         commercial heartbeat of America"