这个系统不但复杂，而且还低效。的翻译：This system is not only complex, but also inefficient. 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

This system not only complex, but also inefficient.

This system is not only complex, but also inefficient.

Not only this system complex, moreover returns the low efficiency.

This system not only complex but also low-efficiency.

This system is not only complex, but also inefficient.