例句與造句

1. All reactors have reactivity feedback mechanisms, but the pebble-bed reactor is designed so that this effect is very strong.
2. In PWRs reactor power can be viewed as following steam ( turbine ) demand due to the reactivity feedback of the temperature change caused by increased or decreased steam flow . ( See : Negative temperature coefficient . ) Boron and control rods are used to maintain primary system temperature at the desired point.
3. Rather, an excess of fuel is inserted with reactivity control mechanisms, such that the reactivity control is inserted fully at the beginning of life to bring the reactor from supercritical to critical; as the fuel is depleted, the reactivity control is withdrawn to mitigate the negative reactivity feedback from fuel depletion and fission product poisons.
4. It's difficult to find reactivity feedback in a sentence. 用reactivity feedback造句挺難的