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。

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.

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然后是日本的地震、台风，还有影响供应美国汽车组装工厂配件的核灾难。

Then it was Japan’s earthquake, tsunami and nuclear disaster which crimped the supply of parts to car assembly plants in America.

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核/壳结构复合纳米材料是具有特殊性能的功能材料，是由一种纳米材料通过化学键或其他相互作用将另一种纳米材料包覆起来形成的纳米尺度的有序组装结构。

The nanocomposite with core/shell structures is an ordered assembly system in which one nanomaterial is covered by another nanomaterial via chemical bond or other interactions.

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