If, however, the pair appears on the edge of an event horizon, either particle or hole may wander across the horizon, never to return.
然而，如果两者出现在视界的边缘，粒子或者黑洞都可能穿过视界再也不会来。
Considering a particle of rosin, the outside of the sample will oxidise first and will also be the first part to then decompose and return to being non-allergenic.
考虑松香粒子，该样本将氧化后，第一次外，也将在第一部分，然后分解，并重新成为非过敏。
Numerically studies the concentration distribution of biological particle similar as SARS virus particle in HVAC system with return air.
采用数值计算方法，对带有回风的空调系统中类似SARS病毒颗粒的生物颗粒浓度的分布规律进行了模拟分析。
Numerically studies the concentration distribution of biological particle similar as SARS virus particle in HVAC system with return air.
采用数值计算方法，对带有回风的空调系统中类似SARS病毒颗粒的生物颗粒浓度的分布规律进行了模拟分析。
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