trickle  
 verb [ I ] uk/ˈtrɪk.əl/ us/ˈtrɪk.əl/
  (LIQUID)     
 trickle down, from, out of, etc. something 从…向下滴(或淌)
If liquid trickles somewhere, it flows slowly and without force in a thin line.
  Blood trickled out of the corner of his mouth. 血从他的嘴角滴了下来。 
 Oil was trickling from a tiny hole in the tank. 油正从油罐上的一个小孔往下滴。 
   (SMALL NUMBER)     
trickle in, out, back, etc. 缓慢而零星地进入/离开/返回(等等)
to arrive or move somewhere slowly and gradually, in small numbers
  Gradually people trickled back into the theatre for the second half. 渐渐地,人们开始三三两两地回到剧院看下半场。 
 trickle  
noun uk/ˈtrɪk.əl/ us/ˈtrɪk.əl/
  (SMALL NUMBER)      
  [ S ]三三两两,零星 
a very small number of people or things arriving or leaving somewhere
  We usually only get a trickle of customers in the mornings. 早上我们店里通常只有零星的顾客。 
   (LIQUID)      
 [ C ]从…向下滴(或淌) 
a small amount of liquid that is flowing slowly in a thin line
  A trickle of melted butter made its way down his chin. 一滴融化了的黄油顺着他的下巴向下滑。