A nucleus that large cannot be stable, but it might be possible to assemble one next to a vacuum for long enough to observe the decay of the vacuum.

这么大的原子核不可能是稳定的，但在足够长的时间内，在真空附近组装一个原子核以观察真空的衰变是可能的。

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The lightning-triggered beams somehow occur in the gases of our atmosphere, offering scientists a rare opportunity to study how such beams stay stable outside a vacuum.

闪电触发的粒子束大气层中以某种方式发生。 这给科学家们研究粒子束如何在非真空状态下稳定存在提供一个难得的机会。

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A good stable vacuum must be safe and powerful, easy to maneuver, and must operate with minimal noise and reasonable energy efficiency.

一套好的马房用吸尘器必须是安全强力、易于使用以及必须是产生最小噪音和合理的能量效率。

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