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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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config.h.cmake.in。新收录的资料是该领域的重要参考
However, family members can veto their loved one's wishes to donate their organs after their death, even if they had signed up to the organ donor register.。业内人士推荐新收录的资料作为进阶阅读
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