An irradiation of 60 sec. limits the build - up of excessive gamma radiation levels.采取60秒辐射限定了剩余伽玛射线水平的增高.However the major portion of the initial gamma radiation is derived from the two latter sources.可是绝大部分早期γ辐射来自后两种来源...
It ranks as one of the top birding destinations in the world.它是世界上观察研究鸟类最佳的目的地之一.He that fears every bush must never go birding.怕鬼怕神,一事无成.He that feareth every bush must never go a - birding.[谚]前怕狼后怕虎,当不了猎户....
Based on thermodynamics principle, the feasibility for melting iron borings in cupola was ana lysed.从热力学角度分析了在冲天炉内熔炼铸铁切屑的可行性.This paper reviews some equiblast cupolas, and introduces emphatically the snail like wind box ...