If someone's chance to win or achieve something disappears, it slips away.
The team didn't want to let the chance to win slip away.
球队不想让获胜的机会溜走。
to leave without being noticed
He managed to slip away from the meeting without anyone seeing him.
他设法从会议上溜走,没有人看到他。
If someone dies, they slip away.
She slipped away peacefully in her sleep.
她在睡梦中平静地去世了。
If time seems to pass quickly, it slips away.
The summer slipped away before we knew it.
夏天在我们不知不觉中就溜走了。