Quindecennial
十五年期间\\na. 每十五年发生一次的, 持续十五年的
🗣️ 情景例句
Because the job was not challenging enough.
因为那份工作挑战性不够。
Better lose a jest than a friend.
宁可不说一句俏皮话，以免得罪朋友们。
but although our faith in many of the things in which our forefathers fervently believed has weakened,
可是虽然我们对我们祖先笃信的许多事物已不太相信，