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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.
。关于这个话题，新收录的资料提供了深入分析
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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