I considered some of the awful things my grandparents and great-grandparents had seen in their lifetimes: two world wars, killer flu, segregation, a nuclear bomb.
我想到了祖父母和曾祖父母在世时遇到的可怕事情：两次世界大战、致命流感、种族隔离、核弹。
Neutron irradiation-induced phosphorus intergranular segregation in the reactor pressure vessel steels is the one of main reasons resulting in brittle fracture of the nuclear reactor vessel.
中子辐照引起的核反应堆压力容器钢中磷的晶间偏析是导致核反应堆压力容器脆性断裂的主要因素之一。
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