The inside part of calibration sphere has to be clean and dust free的翻译：The inside part of calibration sphere has to be clean and dust free 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

校准领域内的一部分，要干净，无灰尘

The inside part of calibration sphere has to be clean and dust free

Inside The part of calibration sphere has to be clean and dust free

The inside part of calibration sphere has to be clean and dust free