powerful wellspring的用法和樣例：
例句
- The happiness that Confucius and his disciples enjoyed can be a wellspring of happiness for us.
孔子和他的弟子享受的快樂同樣可以成為我們快樂的源泉。 - These guerrilla units are powerful auxiliaries to the main force and serve as inexhaustible reserves for its continuous growth.
這種廣大的游擊部隊，造成這個主力的豐富的羽翼，又是這個主力繼續擴大的不斷的源泉。
