To predict the rising velocity of hydrogen gas and the influencing factors, a suitable working fluid was determined for experimental simulation on the vold fraction of hydrogen in a neutronmoderator.
为了推断中子慢化剂液氢中气化氢气泡的上升速度及影响因素，选取合适的工质进行了含气率的模拟实验。
2
The uranium may be put into the reactor in the shape of rods and the rods surrounded with a neutron-slower or moderator.
可以把铀做成棒状放在原子反应堆内，在铀棒的四周，围一层中子减速剂即节速剂。
3
The uranium may be put into the reactor in the shape of rods and the rods surrounded with a neutron-slower or moderator .