当这个应用程序显示一个约会列表时，它检测那些无效记录的字符串模式，然后跳过它们。

As the application displays a list of appointments, it detects the string pattern of those invalid records and skips them.

youdao

因为客户端无法检测出id是无效的，所以它可以在另一个上下文中使用这个ID以链接实体记录。

Because the client can't detect that the id is invalid, it can use the id in another context to link to the entity record.

youdao

如果用户选择删除，所选择的这组约会在记录存储中被标记为无效。

If the user chooses to delete, the set of selected appointments is marked as invalid in the record store.

youdao