澗中撈救 Pulled from the Torrent
八戒與沙僧聽得呼他聖號，急忙解了馬，挑著擔，奔出林來，也不顧泥濘，順澗邊找尋。只見那上溜頭翻波滾浪，急流中淌下一個人來。沙僧見了，連衣跳下水中，抱上岸來，卻是孫大聖身軀。噫！你看他蜷跼四肢伸不得，渾身上下冷如冰。沙和尚滿眼垂淚道：「師兄，可惜了你，億萬年不老長生客，如今化作個中途短命人。」八戒与沙僧听得呼他圣号，急忙解了马，挑着担，奔出林来，也不顾泥泞，顺涧边找寻。只见那上溜头翻波滚浪，急流中淌下一个人来。沙僧见了，连衣跳下水中，抱上岸来，却是孙大圣身躯。噫！你看他蜷跼四肢伸不得，浑身上下冷如冰。沙和尚满眼垂泪道：「师兄，可惜了你，亿万年不老长生客，如今化作个中途短命人。」
逐句解 Line by line
Eight Rules and Sha the Monk, hearing their sacred titles called, hastily untied the horse, shouldered the load, and rushed out of the wood, heedless of the mud, searching along the torrent's edge.
聽得 ‘hearing’: 得 de (complement). 聖號 ‘sacred titles’: 號 hào. 挑著擔 ‘shouldered the load’: 著 zhe (durative); 擔 dàn (a load, noun). 解了 le; 不顧泥濘 (不 before 顧 t4 → bú). The disciples' urgent search.
They saw, up at the head of the current, the waves churning and rolling, and down the swift stream a man came floating.
那上溜頭 nà (deictic; 溜 liū ‘current’). 急流中 中 zhōng. 淌下一個人 ‘a man came floating down’: 淌 tǎng; 一 before 個 t4 → yí. The grim discovery.
Sha the Monk, seeing it, leapt into the water clothes and all, and bore him up onto the bank — and it was the body of the Great Sage Sun.
連衣跳下水中 ‘leapt into the water clothes and all’: 中 zhōng. 抱上岸來 ‘bore [him] onto the bank’. 身軀 ‘body (軀 qū)’. 了 le. Sha's instant plunge to recover Wukong.
Alas!
噫 (yī), a one-word exclamation of grief, standing as its own unit before the descriptive couplet.
Behold him — his four limbs drawn up and unable to stretch, his whole body cold from head to foot as ice.
A verse-form couplet (你看他…) with the tag 你看他 but no ':' marker in the source, so kept as inline prose per the ':'-scan rule. 看 kàn. 蜷跼四肢 ‘limbs curled up (蜷 quán, 跼 jú)’; 伸不得 ‘cannot stretch’: 得 de (potential, V不得); 不 before base 得 t2 → bù. 渾身冷如冰 ‘the whole body cold as ice’.
Sha the Monk, his eyes brimming with tears, said: ‘Elder brother, what a pity for you — a guest of ageless immortal life these hundreds of millions of years, now become a man cut short midway.’
可惜了 le. 億萬年不老長生客 ‘an ageless immortal of hundreds of millions of years’: 不 before 老 t3 → bù; 長 cháng (長生 ‘long life’). 化作個中途短命人 ‘become a man cut short midway’: 中 zhōng (中途 ‘midway’). Sha's lament sharpens the pathos before Bajie undercuts it.
The rescue is staged for maximum pathos before the comedy resumes. Sha plunges into the torrent without hesitation, recovers Wukong's frozen body, and weeps over the terrible reversal — the immortal of ‘hundreds of millions of years’ now ‘a man cut short midway.’ The couplet describing the corpse-like body (蜷跼四肢…冷如冰), though verse in form, is left inline per the source's markers. Sha's grief is genuine; Bajie, characteristically, is about to treat the whole thing as a monkey's trick.