未定輸贏 Neither Has Won Yet
行者道：「這廝驍勇，自昨日申時前後與老孫戰起，直到今夜，未定輸贏。卻得你兩個來接力。如此苦鬥半日一夜，他更不見勞困。才這一夥小妖，卻又莽壯。他將洞門緊閉不出，如之奈何？」行者道：「这厮骁勇，自昨日申时前后与老孙战起，直到今夜，未定输赢。却得你两个来接力。如此苦斗半日一夜，他更不见劳困。才这一伙小妖，却又莽壮。他将洞门紧闭不出，如之奈何？」
逐句解 Line by line
Pilgrim said: "This creature is a bold fighter. He and old Monkey have been at it since about the hour of shēn yesterday, right through to tonight, and neither has won.
The novel is keeping careful time here, and the accounting matters — Eight Rules is about to use these markers to ask where the missing hours went. 申時 is the ninth of the twelve double-hours, running from three to five in the afternoon; 巳時 in the next passage is the sixth, nine to eleven in the morning. 驍勇 is bold and skilled in arms, said of an opponent one respects.
"Luckily you two have come to take up the relief.
卻得 takes 得 at dé, the verb of getting in its settled "luckily got" sense.
"We have fought bitterly like this half a day and a night, and he shows no sign of wearying.
The admission is considerable: the Great Sage rarely concedes that an opponent is not tiring. 更 is gèng, "at all". (不 rises to bú before the falling tone of 見, and 一 to yí in 一夜.)
"And now this pack of little demons besides, and a rough sturdy lot they are.
莽壯 is coarse and strong together, said of numbers rather than of skill. He is counting his difficulties in order, and this is the second of three. (一 shifts to yì in 一夥, before the dipping tone of 夥.)
"He has shut the cave door fast and will not come out. What is to be done?"
如之奈何 is the literary formula for helplessness, and putting it in the Great Sage's mouth is the real news of the passage. 將 is jiāng. (不 stays bù before the level tone of 出.)
The Great Sage takes stock, and the reckoning is honest to the point of discouragement. A day and a night of fighting, an opponent who is not tiring, a hundred fresh demons, and a door shut fast. Three difficulties in order, and then 如之奈何 — the literary formula for having no answer.
That formula is the real content of the passage. The Great Sage does not ordinarily ask what is to be done; he is the one who gets asked. Putting the question in his mouth at the end of a numbered list of obstacles is how the chapter registers that the second attempt has failed as completely as the first.