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The whole reactor is encased in a thick concrete shield, which prevents radiation escaping into the environment.
整个反应都包裹在一层厚厚的混凝土防护层里面，避免辐射泄漏到外界环境中。
Radiation shielding concrete Radiation shielding concrete is used to shield X-rays, and Y-rays in the concrete.
防辐射混凝土 用于屏蔽X 射线、γ 射线和中子辐射作用的混凝土。
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