4.2.1 The door and frame structure must be made from materials that are fit for purpose, and they must comply with the Tesco environmental policy. All parts are to be fully recyclable wherever possible.的翻译：什么意思？中文翻译英文，英文翻译中文，怎么说？

4.2.1门和框架结构必须适合为目的的材料制成的，他们必须遵守与TESCO环保政策。所有零件都必须尽可能充分回收利用。