Before energization it must be ascertained that all protective systems for the unit to be energized are operative.的翻译：Before energization it must be ascertained that all protective systems for the unit to be energized are operative. 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

[object Object]

Before energization it must be ascertained that all protective systems for the unit to be energized are operative.

energization Before it must be ascertained that all protective systems are energized for the Unit to be operative.

Before energization it must be ascertained that all protective systems for the unit to be energized are operative.