据称据说
It is said that
以上为机器翻译结果，长、整句建议使用 人工翻译 。
他与同事一道正在建造据称是世界上最大的低能量反电子捕捉设备，这套设备据说能同时储存上万亿个反粒子。
He and his colleagues are building what they call the world's largest trap for low-energy positrons - a device they say will be able to store more than a trillion antimatter particles at once.
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