Definition
Moving or traveling in the opposite direction to a river's current.
逆流而上
They decided to row up the river to explore its source.
他們決定划船逆流而上，探索河流的源頭。
Salmon swim up the river every year to return to their birthplace to spawn.
鮭魚每年都會逆流而上，回到出生地產卵。
We took a small boat up the river, enjoying the beautiful scenery along the way.
我們乘小船逆流而上，沿途欣賞美麗的風景。