powerful wellspring的用法和样例：
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乐同样可以成为我们快乐的源泉。 - These guerrilla units are powerful auxiliaries to the main force and serve as inexhaustible reserves for its continuous growth.
这种广大的游击部队，造成这个主力的丰富的羽翼，又是这个主力继续扩大的不断的源泉。
