真個手段 Have You Real Skill?
那公主道：「你真個有手段麼？」行者道：「我的手段，你是也不曾看見，絕會降妖，極能伏怪。」公主道：「你卻莫誤了我耶。」行者道：「決然誤你不得。」公主道：「你既會降妖伏怪，如今卻怎樣拿他？」行者說：「你且迴避迴避，莫在我這眼前：倘他來時，不好動手腳，只恐你與他情濃了，捨不得他。」那公主道：「你真个有手段么？」行者道：「我的手段，你是也不曾看见，绝会降妖，极能伏怪。」公主道：「你却莫误了我耶。」行者道：「决然误你不得。」公主道：「你既会降妖伏怪，如今却怎样拿他？」行者说：「你且回避回避，莫在我这眼前：倘他来时，不好动手脚，只恐你与他情浓了，舍不得他。」
逐句解 Line by line
The princess said, "Have you indeed such powers?"
真個, zhēn gè, truly, really; 手段, shǒu duàn, skill, capability — the word can also mean the methods a person is prepared to use, which in his case is apt.
Pilgrim said, "My powers you have not yet seen: I am consummate at subduing fiends, supreme at quelling monsters."
The boast arrives in matched halves: 絕會降妖, jué huì xiáng yāo, wholly master of subduing fiends, and 極能伏怪, jí néng fú guài, supremely able to quell monsters. Two verbs, two objects, the same shape twice — it has the ring of a professional advertisement.
The princess said, "See that you do not fail me, then."
誤, wù, to fail somebody, to lead them astray by a mistake. 耶, yé, a final particle carrying entreaty and doubt together.
Pilgrim said, "I shall by no means fail you."
決然, jué rán, assuredly; 誤你不得, wù nǐ bu de, "cannot fail you."
The princess said, "Since you can subdue fiends and quell monsters, how then will you take him now?"
She has stopped doubting and started planning, which is the sign the argument is over. (降 once more xiáng, subdue.)
Pilgrim said, "Withdraw a while, and be not here before my eyes: for when he comes, it would be awkward to set to work, and I fear that, your love for him being deep, you would not have the heart to give him up."
迴避, huí bì, to withdraw, to keep out of the way; 動手腳, dòng shǒu jiǎo, to set to work — literally to move hands and feet, and used for the sort of work that is better unobserved. 捨不得, shě bu de, to be unable to bear parting with something. He is not being tactful; he is testing her.
The exchange settles the terms of the coming fight in a brisk rhythm of question and pledge, the princess pressing for assurance and Wukong answering in the confident cadences of the professional demon-queller. The matched halves of his boast — master of subduing fiends, supreme at quelling monsters — give his self-assurance an almost liturgical ring.
His request that she withdraw, lest her lingering affection stay his hand, is both psychologically shrewd and a small deliberate provocation. The suggestion that she might, after all, be sorry to see her demon-husband harmed touches the ambiguity of her position — prisoner, and thirteen years his wife — and draws from her the protest that opens the next passage.