Something that is unsuccessful does not achieve what it was intended to achieve.
His efforts were unsuccessful.
他的努力没有成功。
a second unsuccessful operation on his knee.
他膝盖部位第二次不成功的手术。
Someone who is unsuccessful does not achieve what they intended to achieve, especially in their career.
The difference between successful and unsuccessful people is that successful people put into practice the things they learn.
成功者和失败者之间的区别在于成功者能够学以致用。