农地所有人介入土地流转的具体角色定位应是监督者与服务者，为保障农地所有人在介入土地流转中不偏离自己的角色定位，有必要对其在土地流转中的参与权利进行具体限定。
In order that the agricultural landlorder don't deviate from own role, it is necessary to definite concretely its behavior in the circulation of the right of contract for management of land.
营销人员必须明确证实其在产品包装上做的广告，并将这些广告限定为一个具体的益处，例如有多少产品被回收利用。
Marketers must qualify their claims on the product packaging and limit them to a specific benefit, such as how much of the product is recycled.
从那时候开始，我一直在谈论这项行动的限定范围和具体目的。
Since then, I’ve spoken about the limited scope and specific purpose of this mission.
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