sink in/sink into something
phrasal verb with sink verb uk/sɪŋk/ us/sɪŋk/ sank or sunk | sunk
逐渐渗入
If a liquid or soft substance sinks into something solid, it gradually passes into it through its surface.
You'd better wipe up that coffee you spilled on the carpet before it sinks in. 趁洒在地毯上的咖啡没有渗进去之前，你最好把它擦干净。