Dynamic pricing is nothing new and is used across a number of industries. But it's often met with backlash and isn't typically found in online game stores. According to PSprices, Sony is running A/B testing on prices for over 150 games in 68 regions, though the US doesn't currently appear to be part of the experiment. For now, at least, Sony i …
在拓竹、智能派、创想三维等公司将消费级3D打印机降至主流千元入门门槛，销量占据全球超九成消费级3D打印机市场的当下，新入局者似乎已经没有太多想象空间。
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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.