けつあな確定：インターネットスラングで、主にネット掲示板やSNSなどで使われる卑俗な表現。元は「けつなあな確定」の誤記・変形とされる。しばしば、発言や行為の結果として「尻の穴（けつあな）を差し出す＝性的な酷い目にあう／報復を受ける」ことが避けられない、というニュアンスで、冗談めかして「もう後には引けない」「逃げられない」「相当な覚悟が必要だ」という意味合いで使われる。}]} મને defer to the user. Let's defer. There is nothing else. Let's move on. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. Let's go. 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おしりのあながひらくようなことをいって、つよいおどしやばつをあらわすことば

“けつなあな確定”的另一写法（变体）。 / 粗俗的网络用语，字面为“肛门已确定”，用来表示“完了/死定了、要遭殃了”。

2階建て

かいだんで行き来できるかいがふたつあるたてもののつくり

两层建筑；双层楼房 / 双层结构（如双层巴士）

股間 / 星座の名前

ほしのなまえなどに使うむかしのかんじのひとつ

胯部；裆部 / 奎宿（中国二十八宿之一）

スタイル / ランク / ステータス / 等級 / クラス

人やものがもつ ねうちや じょうたいの たかさを あらわす ことば

风格 / 等级 / 地位

脚 / 足

にんげんやどうぶつの、からだをささえたり、あるいたりするところ

腿 / 脚 / （动物的）爪子

ある

たしかで、まちがいがないことをあらわす漢字。たしかめるいみ。

确定的 / 确实的 / 确切的

原子炉の臨界状態に達する前に行われる核実験のこと。核分裂連鎖反応が自己維持可能な臨界状態に達しない範囲で、核物質や核兵器の挙動・性能などを調べる実験を指す。

かくの ざいりょうを つかい ばくはつが おきない ように ためす じっけん

未达到临界、不会引发核爆炸的核试验 / 用于验证核武器与核材料行为的亚临界实验 / 不产生链式裂变反应的核试验

核兵器を保有している国や国家。核兵器の開発・配備を行い、戦略的抑止力として利用し得る立場にある国家。 / 国際社会において、核不拡散条約（NPT）などの枠組みの中で核兵器保有が問題とされる対象となる国家。 / 軍事的・外交的な影響力を、保有する核兵器の存在によって高めている国家。

かくへいきをもつくにのこと。

拥有核武器的国家 / 核武国家 / 核武器拥有国

線形代数において、主対角線より上、または下の成分の一方がすべてゼロであるような正方行列。上三角行列・下三角行列などがある。

すうじをしかくにならべたもので、ななめのせんよりうえかしたがぜんぶれいのもの

主对角线一侧元素全为零的方阵 / 上三角矩阵或下三角矩阵的统称

行列の一種で、主対角線上の成分だけが0でない値を取り、それ以外の成分はすべて0であるような正方行列。線形代数で重要な役割を果たす。

たくさんのかずをしかくにならべたものでななめだけにかずがありほかはみなれいのもの

非对角元素均为零的方阵 / 仅主对角线元素可能非零的矩阵