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Electrons—long used to treat surface tumors and to generate X-rays—are light, nimble particles, far easier to control than protons or carbon ions. At low energies, they stop quickly in tissue, but new high-energy systems can drive electrons deeper. Now researchers are working on machines that combine multiple high-energy beams at different angles to let doctors sculpt radiation doses that match the tumor’s shape.
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伊斯蘭共和國看似比空襲前處於更弱勢地位——失去核心領袖人物、喪失關鍵指揮官，並面臨持續軍事壓力。
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Раскрыты подробности о фестивале ГАРАЖ ФЕСТ в Ленинградской области23:00