大多数黑洞聚集物看起来是直接从气体(叫做冲击层)的消耗中间来的，这表明一个黑洞的成长需要周围有一个星系。

Most black hole mass seems to come from direct consumption (called accretion) of gas, indicating that a black hole needs a surrounding galaxy to grow.

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但是，超压冲击波必然会穿透坚固的铠甲层。

But the overpressure wave inevitably passes through the rigid armor layer.

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其中两个基本保护层旨在抵抗爆炸中产生的两类主要威胁：超压脉冲，或者叫冲击波；以及通常由弹片构成的碎片伤害。

These two fundamental layers are designed to defeat the two main threats in an explosion: the overpressure pulse, or shockwave; and the fragmentation, commonly known as shrapnel.

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