This requires publishers to include at least 4 metadata properties in each object: title, type, image, URL.

这就要求发布者发布的每项对象至少包含4个元数据属性：名称、类型、图像、网址。

youdao

This requires publishers to include at least 4 metadata properties in each object: title, type, image, URL.

这就要求发布者发布的每项对象至少包含4个元数据属性：名称、类型、图像、网址。

youdao