雌雄二寶 The Male and Female Gourds
大聖聞言，就綽了他口氣道：「我的葫蘆，也是那裡來的。」魔頭道：「怎見得？」大聖道：「自清濁初開，天不滿西北，地不滿東南，太上道祖解化女媧，補完天缺，行至崑崙山下，有根仙藤，藤結有兩個葫蘆。我得一個是雄的，你那個卻是雌的。」那怪道：「莫說雌雄，但只裝得人的，就是好寶貝。」大聖道：「你也說得是，我就讓你先裝。」大圣闻言，就绰了他口气道：「我的葫芦，也是那里来的。」魔头道：「怎见得？」大圣道：「自清浊初开，天不满西北，地不满东南，太上道祖解化女娲，补完天缺，行至昆仑山下，有根仙藤，藤结有两个葫芦。我得一个是雄的，你那个却是雌的。」那怪道：「莫说雌雄，但只装得人的，就是好宝贝。」大圣道：「你也说得是，我就让你先装。」
逐句解 Line by line
Hearing this, the Great Sage snatched up his very phrasing: “My gourd, too, came from just there.”
綽 (chāo) — "to snatch up, seize" (= 抄); 綽了他口氣 means "caught up his tone / turned his own words on him." 那裡 (nǎ) echoes the demon’s "whence."
The fiend-chief said: “How can that be?”
怎見得 (zěn jiàn de) — "how is it evident? what makes you say so?"; 見得 is the potential "to be able to tell," 得 read as the toneless complement de.
The Great Sage said: “From when the clear and turbid first parted — Heaven falling short in the northwest, Earth falling short in the southeast — the Most High Daoist Patriarch transformed into Nüwa and made good the sky’s defect. Coming to the foot of Mount Kunlun, he found an immortal vine, and on the vine hung two gourds.”
Wukong faithfully reproduces the demon’s cosmogony — 天不滿西北，地不滿東南, the classic account of the world’s tilt (sky wanting in the northwest, earth sinking in the southeast) — but adds the crucial variation: not one gourd, but two.
“I got the male one; that one of yours is the female.”
Wukong’s invention: a matched pair, 雄 and 雌 (male and female), his the male. 得 here is dé, "obtained"; 那個 (nà) deictic, "that one."
The fiend said: “Never mind male or female — so long as it can bottle a man, it’s a fine treasure.”
裝得人 (zhuāng de rén) — "able to bottle a person," 得 the potential complement de. Refreshingly practical, the demon waves away the fiction and fixes on the one test that counts.
The Great Sage said: “You speak rightly there. I’ll let you bottle first.”
說得是 (shuō de shì) — "spoke aright." Wukong’s mock-generosity — offering the demon the first turn — is the hinge of the trap that follows.
Wukong caps the demon’s tale by "snatching up his very words" and reciting the same cosmogony back — the sky-tilts-northwest myth — with one invented flourish: the gourds are a matched pair, male and female, his the male. It is improvisation as one-upmanship, the con artist elaborating on the mark’s own story.
The demon, blessedly literal-minded, brushes the fiction aside — 莫說雌雄 — and returns to the only question that matters: can it bottle a man? Wukong’s reply, conceding the point and yielding the first turn, is pure dramatic irony. He is not being sporting; he is setting the exact order by which the fiend will be undone.