任务书—任务报告的协作模式这套工作流的核心是把知识积累和任务执行拆成两个彼此独立的上下文。
Protons can penetrate up to 30 centimeters, reaching deep-seated tumors. But the delivery of protons in a continuous beam limits the dose rates. Also, proton systems are far larger and more expensive than, say, X-ray machines, which will likely constrain their availability to specialized centers.
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