结论：管理者必须卓有成效的翻译：Conclusion: managers must have been very effective 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Conclusion: Managers must be effective

Conclusion: managers must have been very effective

Conclusion: The superintendent must be fruitful

Conclusions: managers need to fruitful

Conclusion: managers must have been very effective