氦氣不是很輕嗎? 都飄上太空了，到底是哪來的? 放飛氣球竟然會毀掉科研? 氦氣背後的真相 液太氦 液態氮 超頻 超導體 核磁共振影像儀 磁振造影 MRI

氦氣不是很輕嗎? 都飄上太空了，到底是哪來的? 放飛氣球竟然會毀掉科研? 氦氣背後的真相 液太氦 液態氮 超頻 超導體 核磁共振影像儀 磁振造影 MRI

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