harmful folly

• 无害的蠢事

harmful folly的用法和样例：

例句

1. He was betrayed by social ambitions into irreparable folly.
   由于社交方面的野心，他做出了无法补救的蠢事。
2. He persisted in his folly despite his friend's advice.
   他不顾朋友们的劝告，硬是继续干他的蠢事。