从最通俗的角度讲，核反应实质上就是发生在原子核中的一种反应过程。

A nuclear reaction is at its most basic nothing more than a reaction process that occurs in an atomic nucleus.

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首先，这些武器应当只在遭受核袭击后反击时才使用。其次，这些武器的拥有必须是一种临时的应急手段。

First, the weapons should be intended for use only in retaliation after a nuclear attack. Second, the possession of the weapons must be a temporary expedient.

《柯林斯英汉双解大词典》

舞毒蛾还会受到核多角体病毒或萎蔫病的攻击，在毛虫爆发的年代，这是一种特别重要的杀手。

The gypsy moth is also subject to attack by the nucleopolyhedrosis virus, or wilt disease, a particularly important killer of the caterpillars in outbreak years.

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An experiment called functional magnetic resonance imaging as illustrated here.

有一种试验叫做功能核磁共振成像。

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One is the trivial case, homonuclear.

第一种很没有意思，就是同核。

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