例句與造句

1. The mean generation time is different from the prompt neutron lifetime because the mean generation time only includes neutron absorptions that lead to fission reactions ( not other absorption reactions ).
2. The "'prompt neutron lifetime "', " l ", is the average time between the emission of neutrons and either their absorption in the system or their escape from the system.
3. When at least one dollar of reactivity is added above the exact critical point ( the point where neutrons produced is balanced by neutrons lost per generation ) then the chain reaction does not rely on delayed neutrons, and the rate of change of neutron population increases exponentially as the time constant is the prompt neutron lifetime.
4. It's difficult to find prompt neutron lifetime in a sentence. 用prompt neutron lifetime造句挺難的