开发商必须按要求履行保护义务的翻译：Developers must be required to fulfil the obligation to protect 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

Developers must be required to fulfill the obligation to protect

Developers must be required to fulfil the obligation to protect

The developer must according to the request fulfillment protection duty

Developers must be required to perform its obligation to protect

Developers must be required to fulfil the obligation to protect