我专业是机械制造及其自动化的翻译：I majored in mechanical manufacturing and automation 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

My major is Mechanical Manufacturing and Automation

I majored in mechanical manufacturing and automation

My specialty is the machine manufacture and the automation

My specialty is machinery manufacturing and its automated

I majored in mechanical manufacturing and automation