探索活动星系的快速光变，是研究星系中心致密核结构及辐射机制的强有力手段。
Searche for rapid variability in the flux from active galaxies has the Promise of being a very powerful tool for understanding their emission mechanisms.
为了制备高温气冷反应堆用燃料芯核，致密uo_2微球，研究了一种新的溶胶-凝胶工艺。
A new kind of sol - gel process for preparation of dense UO2 kernels used for HTGR (High Temperature Gas cooled Reactor) has been developed in our institute.
够广大且够致密的云核，会以自身的重量克服向外的气体压力而崩塌。
A sufficiently large and dense core can overcome the outward force of gas pressure to collapse under its own weight.
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