不成功的用英语怎么说？

不成功的

例句

• In other experiments, some of the lost foetuses were abnormal. 在其他的实验中, 有一些不成功的胎儿是畸形的.
• a brief and unsuccessful flirtation with the property market 对房地产市场一时兴起、并不成功的介入
• Critics will point to other grand schemes that have gone less well, such as Sheffield's World Student Games disaster... 批评家将会指出其他一些并不成功的大项目，比如谢菲尔德世界大学生运动会这一败笔。