时成时败的

例句：

1. 1. The company's performance has been both successful and unsuccessful in recent years.
   这家公司近年来的表现既有成功也有失败。
2. 2. The project was a success, but the implementation phase was a failure.
   这个项目成功了，但实施阶段失败了。
3. 3. The team's performance has been both successful and unsuccessful in recent months.
   这个团队最近几个月的表现既有成功也有失败。