Epic storms triggered by a space phenomenon obliterate cities | and the only answer to escaping complete annihilation rests on a small-town teen's extraordinary science project.
史诗风暴由空间现象触发的城市|而逃避完全湮灭的唯一答案取决于一个小城镇青少年的非凡科学项目。
The positron annihilation lifetime spectrum(PALS) method was employed to study the effect of proton radiation on microstructure of the space grade KH-L-Y polysilicone rubber.
用正电子淹没寿命谱方法（PAL S）研究了质子辐照对空间级硅橡胶KH- L - Y微观结构的影响。
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