Go to technology
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.
。业内人士推荐新收录的资料作为进阶阅读
ITmedia�̓A�C�e�B���f�B�A�������Ђ̓o�^���W�ł��B
AI has made it vastly easier for malicious hackers to identify anonymous social media accounts, a new study has warned.
MP not seen anything to suspect husband has 'broken any law', after China spy arrests