11.   Experts believe it will have to be strengthened in order to prevent the deadly radiation in the molten core from leaking out.

a. + radiation >>共 243
ultraviolet 16.00%
solar 7.24%
infrared 4.21%
electromagnetic 3.50%
harmful 3.15%
nuclear 2.80%
dangerous 2.22%
intense 1.99%
increased 1.87%
external 1.75%
deadly 1.29%
deadly + n. >>共 869
attack 7.98%
virus 4.95%
weapon 4.51%
disease 4.47%
force 3.07%
bombing 2.21%
bacterium 2.01%
suicide 1.97%
clash 1.92%
riot 1.33%
radiation 0.24%
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