1、They built a triumphal arch to memorialize their victory.
他們建了凱旋門來紀念勝利。

2、This huge triumphal arch was erected at the beginning of this century.
這座巨大的凱旋門是本世紀初建造的。

3、A triumphal arch was built to celebrate the victory.
為慶祝勝利建造了一座凱旋門。