Radiation doses to humans may be characterized as low-level if they are comparable to natural background levels.

对人类的放射剂量如果与自然环境辐射水平相比属低水平。

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The project may be characterized as providing venues for open-ended, prototypical practices, or arenas for communication and negotiations.

项目的特征可作为开放式的场地，实践原型或沟通和谈判的场所。

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Each service, implicitly or explicitly, also represents the transfer of information between nodes and may be characterized as a message or operation.

每种服务还隐式或显式地表示节点之间的信息传递，并且可能被描述为一个消息或运作。

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This advice may run contrary to what might be characterized as test madness--the tendency of doctors and patients to want to test in all sorts of ways, using dozens of parameters that purport to measure how well your internal bodily engine is running.

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