secondary pattern

• 二次辐射图

secondary pattern的用法和样例：

例句

1. The reason is that charged particles and high-energy photons interact with the rocky shielding material, producing showers of secondary radiation within the meteorite.
   原因在于带电粒子与高能光子会与岩石遮蔽物质交互作用，在陨石内部引发二次辐射的簇射。