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。

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。

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。

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。