热中子

例句：

1. 1. Neutrons are essential for the stability of nuclear reactions.
   中子对于核反应的稳定性至关重要。
2. 2. The neutron star is a pulsar that produces intense radiation.
   中子星是一个脉冲星，它产生强烈的辐射。
3. 3. Neutron stars are the remnants of massive stars that have exhausted their nuclear fuel.
   中子星是耗尽了其核燃料的巨型恒星的残留物。