sink／soak in
1．（cause to）sink into陷入；沉入
If the ink sinks in it'll be hard to remove the spot from the cloth．布一沾到墨水，墨迹就很难洗净。
2．be absorbed， understood or acknowledged被充分理解或领会
I think it has finally sunk in that she must be more careful：she won't forget her passport again！我想她终于领悟到她必须更加小心，她再也不会忘了她的护照！
Everybody laughed at the joke but Joe；it took a moment for it to sink in before he laughed too．除了乔每个人都被这笑话逗乐了，过了一会儿他完全理解过来也笑了。