Numerical calculations show that the interface phonons in the active core can be classified as bulk phonons and surface phonons.

计算显示有源核中的界面声子可以分为体声子和表面声子模式。

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The active core of a nuclear reactor splits atoms in two to produce bursts of energy and, as a byproduct, large masses of highly radioactive particles.

核反应堆的活动区将原子一分为二，从中产生大量的能量，同时作为副产品，会产生大量的发射性很高的物质。

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The mountain last erupted in 1903, but experts cite recent scientific data that suggests Paekdu has an active core that, if it erupts, could cause a huge lake to overflow and flood surrounding areas.

白头山最近一次火山喷发是在1903年，但专家认为白头山可能是一座活火山。如果爆发，可能导致一个巨大的湖泊氾滥，淹没周边地区。

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No active trader should be core long up here.

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There is, however, a non-negligible risk in 2013 that one or more or the larger central banks outside of the core will turn to active selling.

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As active traders along the way we have traded heavily around these core positions, and exited stocks that began to exhibit consistent weakness (namely SNDK).

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