Made or done to celebrate a victory. `Triumphal` attaches to the ceremony, the object, the procession — the public machinery of celebrating a win. A triumphal arch is built so that a victorious army can march through it; a triumphal procession, entry, or return is the parade itself.

Made or done to celebrate a victory是為了慶祝勝利而做、而辦的。`Triumphal`這個字 attaches to the ceremony, the object, the procession用在典禮、物品、遊行上 — the public machinery of celebrating a win也就是慶祝勝利的那整套公開排場。A triumphal arch凱旋門 is built so that a victorious army can march through it是蓋來讓打勝仗的軍隊通過的; a triumphal procession, entry, or return凱旋遊行、凱旋入城、或凱旋歸來 is the parade itself指的就是那場遊行本身。

The word points outward at the event, not inward at anyone's feelings. That is the line students most need: `triumphal` is about the CELEBRATION, `triumphant` is about the PERSON or their manner — a triumphant general grins on the triumphal arch.

The word這個字 points outward at the event指向的是那個事件本身, not inward at anyone's feelings而不是指向任何人內心的感受。That is the line students most need這是學生最需要抓住的分界: `triumphal`『triumphal』 is about the CELEBRATION講的是慶祝這件事本身, `triumphant`『triumphant』 is about the PERSON or their manner講的是那個人或他的樣子 — a triumphant general grins on the triumphal arch像是「一位得意洋洋（triumphant）的將軍在凱旋門（triumphal）上露出笑容」。

The word keeps its Roman clothing. In ancient Rome a "triumph" was a specific state honour: a winning general was voted the right to parade through the city with his soldiers, his loot and his prisoners.

The word這個字 keeps its Roman clothing還留著它羅馬式的外衣。In ancient Rome在古羅馬, a "triumph"一個「triumph」 was a specific state honour是一種特定的國家榮譽: a winning general was voted the right to parade through the city打勝仗的將軍會被投票授予在城裡遊行的權利, with his soldiers, his loot and his prisoners帶著他的士兵、戰利品、和俘虜。

So `triumphal` sounds grand, old and slightly formal even today, and it is most at home in history, architecture and journalism about big ceremonies. Writers do stretch it to smaller things for effect — "a triumphal lap of the office with the signed contract" — and the stretch is felt as a mild joke, borrowing Roman grandeur for something small.

So所以 `triumphal`『triumphal』 sounds grand, old and slightly formal even today即使到了今天聽起來還是很盛大、古老、有點正式, and it is most at home in history, architecture and journalism about big ceremonies它最常出現在歷史、建築、和報導大型典禮的新聞寫作裡。Writers do stretch it to smaller things for effect作家有時會為了效果把它用在比較小的事情上 — "a triumphal lap of the office with the signed contract"像「拿著簽好的合約在辦公室裡凱旋繞一圈」 — and the stretch is felt as a mild joke這種延伸用法會讓人感覺是個小玩笑, borrowing Roman grandeur for something small借用羅馬式的盛大感來講一件小事。