Message in Chinese (Simplified) (中文(简体))
Query 操作“<var>X</var>”只返回单个值，不能标记为默认操作。
Unlocalized message
Query operation '<var>X</var>' cannot be marked as the default because it returns only a single value.
Search by GoogleQuery 操作“<var>X</var>”只返回单个值，不能标记为默认操作。
Query operation '<var>X</var>' cannot be marked as the default because it returns only a single value.
Search by Google