潺潺水響 The Sound of Running Water
好大聖,收了棒,束束裙,拽開步,轉過山坡,忽聽得潺潺水響。且回頭看處,原來是澗中水響,上溜頭沖泄下來。又見澗那邊有座門兒,門左邊有一個出水的暗溝。好大圣,收了棒,束束裙,拽开步,转过山坡,忽听得潺潺水响。且回头看处,原来是涧中水响,上溜头冲泄下来。又见涧那边有座门儿,门左边有一个出水的暗沟。
逐句解 Line by line
A fine Great Sage: he put away his rod, hitched up his skirts, strode out, rounded the mountain slope, and all at once heard the babble of running water.
The scene shifts from grief to scouting in twenty-three characters, and the sound is what turns it. 潺潺 doubles a character to make the noise of a stream — the word is the sound. In 聽得, to hear, 得 is dé, the reading that follows a verb of perceiving.
He turned his head to look, and it was the water in the ravine that was sounding, pouring down from the head of the current above.
上溜頭 is the upstream end of a run of water. Wukong is doing something very ordinary here — following a stream to see where it comes from — and it is about to be the most useful thing anybody does in the chapter.
Then he saw that on the far side of the ravine there was a gate, and to the left of the gate an outfall drain running out of it.
There it is. 暗溝 is a covered drain, and finding one is finding a way in that is not a door. Water has to leave a cave the way it leaves a house, and Wukong has just worked out that the plumbing is a corridor.
This is detective work, not magic. Wukong hears water, follows it upstream, and reasons that a stream coming out of a hillside has to be coming out of something. The back door is found by paying attention to a noise.
The drain matters more than the gate beside it. A gate can be blocked, as the front one has been; a drain cannot, because the cave needs it. Wukong has found the one opening the fiends cannot afford to seal.