no obj., with adverbial of direction
1- (of a liquid) flow in a small stream（液体）滴, 淌：
a solitary tear trickled down her cheek
一颗泪珠滑下她的脸颊
as adj. trickling a trickling brook.涓涓溪水。
1.1
- with obj. and adverbial of direction cause (a liquid) to flow in a small stream使（液体）滴, 淌：
Philip trickled a line of sauce on his fish fingers.
菲利普把沙司在冻鱼条上挤成一条。
1.2
- come or go slowly or gradually缓慢地来（或去）; 逐渐地来（或去）：
the details began to trickle out.
细节开始慢慢显现出来。
1
- a small flow of liquid滴, 淌：
a trickle of blood.
血滴。
1.1
- a small group or number of people or things moving slowly缓慢移动的人群（或一群东西）：
the traffic had dwindled to a trickle.
车流已渐渐变得稀疏。
- trickle down (of wealth) gradually benefit the poorest as a result of the increasing wealth of the richest（财富）（因最富人群的财富增加）逐渐惠及最穷人群。
词源
Middle English (as a verb)： imitative.